Gravity are being pulled down the slide by gravity, but there is also another physics principle at work: friction or resistance. Two factors contribute to friction's force.
What forces are at work when someone slides down a slide?Answer and justification Gravitational and frictional forces may have an impact on a child's motion as they descend a slide.
What forces are at work when an object slides?Contact is a force acting such as the normal force that prevents two things from sliding past one another. Friction moves an object's flat surface in a direction opposite to the normal force, which moves an object perpendicular to its flat surface.
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a cylinder with cross-section area a floats with its long axis vertical in a liquid of density rho.
a) The expression for force needed to push the cylinder distance deeper into the liquid by a distance x is F = ρ × A × x.
b) The work done to push the cylinder 10 cm deeper into the water is 12.315 N-m.
The force required to push the cylinder by a certain distance is nothing but the weight of the liquid displaced by the same distance.
So, F = ρ × A × x
where, p is density
x is distance
A is area
We know the expression for work as, W = F × z
where, z is the work required to move through distance z
From a) we can write F = A × z² × ρ
Given that, d = 4 cm
So, r = 2 cm = 0.2 m
z = 10 cm = 0.10 m
ρ = 1000 kg/m³ = 9800 N/m³
Substituting the values in the above equation, we have,
W = π × 0.2² × 0.1² × 9800 = 12.315 N-m
The question is incomplete. The complete question is 'a.) Pressing down on the cylinder pushes it deeper into the liquid. Find an expression for the force needed to push the cylinder distance deeper into the liquid and hold it there.
'b.) A 4.0 cm diameter cylinder floats in water. How much work must be done to push the cylinder 10 cm deeper into the water?'
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An awkward moose slides along an icy surface with a velocity of 5.2 m/s to the left. The moose runs into a
owbank and gradually comes to a stop over 0.47 seconds. If the force the moose experienced was 62
Newtons, calculate the mass of the moose.
Answer:
m= 5.60kg
Explanation:
∑F = m*a
m = ∑F/a; a = Δv/Δt
m = ΣF/(Δv/Δt)
m = (62N)/((5.2m/s)/(0.47s))
m = 5.60kg
Michael’s mom is driving the soccer carpool. They leave the field at 7 pm, with an odometer reading of 78,753 km. Combined the minivan and players have a mass of 2900 kg. After all the players are dropped off, it is 7:56 pm and the odometer reads 78,802 km. What was the average velocity of the minivan while traveling?
Answer:
0.875 miles/minute
Explanation:
The formula for velocity if final position - initial position divided by final time - initial time. Here, the final position
of the van was 49 km away from house, and its initial was 0, because you didn't travel anywhere initially. The final time was 56 minutes because that was how long it took to get home, and the initial was 0, because you were 0 minutes into travel at the beginning.
In order to determine causal effects between variables, researchers must use. a. Correlational designs b. Case studies O c Experimental designs O d. All of the above
To identify the factors influencing the associations between the variables, researchers must adopt a correlational design.
An investigator who carries out research, that is, a planned and methodical examination of something, is referred to as a researcher. As researchers, scientists are frequently referred to.
Researchers are employed by authors of books that require extensive information collection, such as those by Michael Crichton who write about biology, to assist them in compiling and analyzing data. Some authors conduct their own research by consulting friends who are doctors to find intriguing methods for their characters to pass away.
Research and development (R&D) of methods and systems for the expansion of human knowledge are the main goals of fundamental research (as opposed to applied research). These goals include documentation, discovery, interpretation, and R&D. Research methodologies rely on epistemologies, which differ greatly within the humanities and sciences as well as within each discipline. Science, the humanities, the arts, business, marketing, and social and economic research are some of the several types of research.
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What is the correct formula for wavelength as a function of energy?
The relationship between wavelength, energy, and frequency is expressed by the formula E = hv = hc/, where E is energy, h is Planck's constant, v is frequency, c is the speed of light, and w is wavelength.
How do you determine a function's wavelength? The relationship between wavelength, energy, and frequency is expressed by the formula E = hv = hc/, where E is energy, h is Planck's constant, v is frequency, c is the speed of light, and w is wavelength. The formula wavelength = wave velocity/frequency can be used to determine wavelength.Wavelength is typically measured in meters.Greek lambda is the sign for wavelength, therefore = v/f.Wavelength and frequency have a connection to energy just as they do to light.Higher frequency and shorter wavelengths are correlated with more energy.Therefore, lower energy is produced when the wavelengths are longer and the frequency is lower.E = h is the formula for energy.To learn more about wavelength refer
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A 200 ω resistor, a 0.850 h inductor, and a 5.75 μf capacitor are connected in series across a voltage source that has voltage amplitude 29.0 v and an angular frequency of 260 rad/s.
a. What is v at t= 22.0 ms ?
b. What is vR at t= 22.0 ms ?
c. What is vL at t= 22.0 ms ?
d. What is vC at t= 22.0 ms ?
The root mean square voltage Vrms of the circuit is 15.49 V.
The voltage of the resistor vR is 10.4 V.
The voltage of the inductor vL is 11.49 V.
The voltage of the capacitor vC is 0.035 V.
RMS voltage of the circuit is calculated as follows:
Vrms = -V₀ sin ωt = -29 * sin (260* 22* 10⁻³) = 29 * 0.534 = 15.49 V
XI = ωL = 260* 0.85 = 221 ohms
Xc = 1/ωc = 1/(260 * 5.75* 10⁻³) = 10³/1495 = 0.67 ohm
Z = √[R² +(XI - Xc)²] = √[200² + (221 - 0.67)²] = √[200² + 220.33²]
= √[ 40000 + 48545.30] = 297.56 ohm
Current flowing in the circuit is
Irms = Vrms/Z = 15.49 / 297.56 = 0.052 A
vR = Irms * R = 0.052 * 200 = 10.4 V
vL = Irms * L = 0.052 * 221 = 11.49 V
vC = Irms * C = 0.052 * 0.67 = 0.035 V
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potassium can emit photoelectrons when struck by blue light, whereas tungsten requires ultraviolet radiation to emit photoelectrons. which statement is true?
It is true that no photoelectrons are released when ultraviolet radiation strikes a surface.
Which metal only emits electrons in response to UV light?It was discovered that certain metals, such as zinc, cadmium, magnesium, etc., only emitted electrons from their surfaces when exposed to ultraviolet light with a short wavelength. Lithium, sodium, potassium, caesium, and rubidium are examples of alkali metals that can be sensitive to visible light.
Why don't photoelectrons release?If the frequency of the light is less than a specific level, no photoelectrons are released. The threshold frequency is referred to as such. For many materials, the threshold frequency varies. Alkali metals, calcium, and barium lose their photoelectron content when exposed to visible light.
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What is n equal to in math?
It serves as a shorthand for the collection of all natural numbers. Positive, non-zero whole numbers make up the natural numbers.
What does N look like as a number?Natural Numbers (N) are the whole numbers 1, 2, 3, 4, and so on. They are also known as positive integers, counting numbers, or natural numbers (W). The collection of natural numbers is indicated. The letter n is used to begin the word number. This is why the n symbol is used in mathematics.
What does N in a sum mean?The parameter n is referred to as the "index of summation." As you go from the first number to the last, replace the index of summation with consecutive integers to create the terms of a series expressed in sigma notation.
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if an am radio station is emitting 10000 w in its 840-khz radio wave, how many photons is it emitting each second
The transmission will be seen as an electromagnetic wave. Radio antennas, like flashlights, emit lower energy photons that our eyes cannot see.
A cyclically alternating voltage causes electrons in the antenna's cables to jiggle back and forth. By the way, radio frequency photons have significantly less energy than visual photons. Yes, radio antennas can emit visible light, but most likely not in the way you expect. Through the process of thermal radiation, you can heat up a radio antenna until it glows and emits visible light if you apply enough energy to it. Radio antennas, like flashlights, emit lower energy photons that our eyes cannot see.
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a truck with 0.363-m-radius tires travels at 23.9 m/s. what is the angular velocity of the rotating tires in radians per second?
Answer:
Below
Explanation:
Circumference of tires = 2 pi * r=2.28079 m
rpm * 2pi = (23.9 m/s )/ (2.28079 m) * 2pi = 65.8 R/s
a motorized cable moves a 2000kg elevator upwards at constant velocity for 10m.a) what is the work done by the motor?
The work done by the motor is 196×10⁴Joules, if a motorized cable moves a 2000kg elevator upwards for 10m.
We know that from The work-energy hypothesis, otherwise called the rule of work and dynamic energy, expresses that the all out work done by the amount of the multitude of powers following up on a molecule is equivalent to the adjustment of the motor energy of that molecule. This clarification can be reached out to inflexible bodies by portraying crafted by rotational motor energy and force
In order words, W=F.dx
where F is the force applied on the body, dx is the displacement of the body.
Now, for calculating force we know that gravity is acting on it
So, force applied on the body is =mg where m is the mass and g is acceleration due to gravity.
We have m=2000kg and g=9.8m/sec²
So, value of mg=2000×9.8=19600.0=19600N
Now, we have displacement(dx)=10m
So, work done=196000 × 10=1960000Joules or 196×10⁴Joules.
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a magnetic field of 0.080 t is in the y-direction. the velocity of wire segment s has a magnitude of 78 m>s and components of 18 m>s in the x-direction, 24 m>s in the y-direction, and 72 m>s in the z-direction. the segment has length 0.50 m and is parallel to the z-axis as it moves. (a) find the motional emf induced between the ends of the segment. (b) what would the motional emf be if the wire segment was parallel to the y-axis?
The wire segment was parallel to the y-axis E = 0.72 volt ;E = 0 volt are the answer.
What is segment?Segmentation is the process of dividing a large target market into smaller, more distinct groups of people who share similar characteristics. Segmentation is a key practice of modern marketing, as it allows businesses to identify and target their most valuable customer groups more effectively. By segmenting customers, marketers can better tailor their campaigns to their specific customer base and maximize their marketing investment. Segmentation also helps organizations identify and target the right audiences with the right message.
Given that – Length of segment = 0.50m
1. E = L * (V x R)
E = 0.50k {(18i + 24j +72k) x (0.800j)}
E = 0.50 * 18 * 0.800 + 0
E = 0.72 volt
Thus, the motional emf will be 0.72 volt
2. If the wire segment is parallel to y-axis
E = 0.50j * {(18 x 0.080) k – (72 x 0.800) i)}
E = 0 volt
Thus, the motional emf in this situation is zero.
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What measuring instrument should be used to determine if there was presence of electricity running in her extension cord?
Electrical voltage can be found in cable, cables, circuit breakers, light fixtures, outlets, and switches using voltage testers and receptacle analyzers.
How do you determine whether there is electricity present?
Simply place one tester probe against a hot wire, screw terminal, or outlet slot to utilise a neon voltage tester. Connect the second probe to a ground or neutral contact. If there is current, the small neon bulb at the tool's tip will light up.
Which test is performed to detect whether a piece of equipment contains electricity?
test bulbA piece of electrical test equipment called a test light, test lamp, voltage tester, or mains tester is used to determine whether electricity is present in a piece of equipment that is being tested
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You are going on a field trip in a school bus. A special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey. The tire's diameter is 111 meter, and it made 800080008000 rotations during the trip. How far did the bus travel? round your answer to the nearest meter.
The bus will go 2.788×10^14 meters far if the special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.
What is a circle?
It is described as a set of points, where each point is at the same distance from a fixed point called it's center.
wr are going on a field trip in a school bus. A special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.
It is given that diameter (D) of the tyre = 111 meters
circumference of the tyre = πD
circumference of the tyre = 3.14 × 111
= 348.5 m
In 800080008000 rotations, total distance covered = 348.5 × 800080008000 = 2.788×10^14
Thus, the bus will go 2.788×10^14 meters far if the special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.
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What is this formula used to find V Πr²h?
The formula V = π r² h is used to find the volume of a cylinder.
The volume of a cylinder refers to the density of the cylinder which indicates the amount of material it can hold or how much amount of any material can be immersed in it. To calculate a cylinder's volume, the formula to be used is v = π r² h. In this formula:
V signifies the volume of the cylinderπ r² represents the area of the base of the cylinder, where r is the radiush is the height of the cylinderHence, the required formula for the volume of a cylinder is V = π r² h.
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Compared with the orbits of the short-period comets, the orbits of long-period comets
(a) tend to lie in the plane of the ecliptic
(b) look like short-period orbits, but are simply much larger
(c) are much less eccentric
(d) can come from all directions
Compared with the orbits of the short period comets, the orbits of long period comets can come from all directions.
Short period comets come from the kuiper belt. Comets of long period come from the ort cloud which is a cloud debris surrounding the sun at a distance of 1 light year.
Long period comets have orbital period more than 200 years. Their orbits are inclined in the ecliptic plane. They may be perturbed by a passing star. Their orbits are highly inclined because of spherical origin.
They can be seen in night sky with much brilliance. Their brilliance is because thy have not passed from inner solar system.
Short period comets have orbital period less than 200 years. Haily type comets are example of short period comets.
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76.9kg male and 44.4kg female pair figure skating team gliding across the ice at 7.26 m/s preparing for a throw jump maneuver. The male skater tosses the female skater forward with a speed 8.83 m/s . Determine the speed of male skater after the throw .
The speed of male skater after the throw will be 6.35 m/s.
What is momentum?The relationship between a particle's mass and velocity is called momentum. Being a vector quantity, momentum possesses both magnitude and direction.
Given that 76.9kg male and 44.4kg female pair figure skating team gliding across the ice at 7.26 m/s.
the female skater is tossed forward with a speed 8.83 m/s .
Let the speed of male skater after the throw = v m/s.
From principle of conservation of momentum,
Total initial momentum = total final momentum
⇒ (76.9 + 44.4) × 7.26 = 76.9×v + 44.4×8.83
⇒ 76.9×v = (76.9 + 44.4) × 7.26 - 44.4×8.83
⇒ v = 6.35 m/s.
Hence, the speed of male skater will be 6.35 m/s.
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What happens when a magnet moves near or in a coil of wire?
Answer:
Below
Explanation:
A VOLTAGE is induced across the coil.... if the ends of the coil are connected together or to a circuit, a current will flow
On a graph of galaxy colors and luminosities, spiral galaxies are usually found in the ____________.
On a graph of galaxy colors and luminosities, spiral galaxies are usually found in the blue cloud.
any of the star systems and interstellar materials that make up galaxys. Hundreds of billions of stars can be found in several of these massive assemblages.
From dim, hazy dwarf objects to magnificent spiral-shaped giants, nature has created a vastly diverse assortment of galaxies. Almost all galaxies seem to have formed shortly after the universe started, and they can be found everywhere throughout space, even in the deepest regions that are beyond the reach of even the most potent contemporary telescopes. Galaxies typically exist in groups called clusters, some of which are then combined into larger clusters with a diameter of hundreds of millions of light-years. (A light-year is a distance traveled by light during one year at a speed of 300,000 km/sec or 650,000,000 mph.)
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which property of jupiter's moon europa makes it a more likely candidate to harbor extraterrestrial life? select one: a. satellite images show seasonal variations on its surface. b. satellites have detected oxygen in its atmosphere. c. hydrothermal activity provides energy to heat and melt an ocean of water beneath its surface. d. jupiter's powerful magnetic field generates electrical activity on its surface.
Therefore, even though Europa has a diameter that is only one-fourth that of Earth, her ocean may hold twice the amount of water as Earth's seas do.The immense and unfathomably depths ocean of Europa is regarded as the best area to look for life outside of Earth.
Why then is Europa the Galilean moon most likely to have life?As a result of the liquid water's close proximity to the silicate mantle, Europe is one of the finest options for habitability.The amount of radiation that strikes the moons from Jupiter is a crucial component in determining whether or not they are habitable.
What quality of Europa, a moon of Jupiter, makes it possibly habitable?Europa would need to contain the necessary chemical components for life's chemistry in order to be potentially habitable.These include the frequently occurring elements carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur, which are thought to have been present on Europa at the time it originated.
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A jet engine generates 160 kn of force as it propels a 20.000kg plsn down a run way. If 49 kn of friction opposes the motion of the plane how much time win it take for the plmu to reach a speed of 33 m/s from Yest?
Time taken by plane reach a speed of 33 m/s from rest is 4.125 second.
What is force?
The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. The Newton is the SI unit of force.
Force generated by the jet engine: F = 160 kN = 160000 N.
Mass of the Plane: M = 20000 kg.
Acceleration of the plane = force/mass
= 160000 / 20000 m/s²
= 8 m/s².
Hence, Time taken by plane reach a speed of 33 m/s from rest =
change in speed/acceleration
= (33 -0)/8 second
= 4.125 second.
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Wy is it necessary to reduce the voltage to a motor when the frequency is reduced?
To reduce magnetic flux density, it is necessary to reduce the voltage to a motor when the frequency is reduced. This will resist lowering of inductive reactance and increase of rotor current
When we decrease voltage applied to the motor. The current in stator is winding as well as the magnetic flux density will decrease along with decrease in induced voltage.
The voltage induced over rotor's conductor is defined here
,[tex]V_{R[/tex] = B.l.u
We can see things in other way also. Changing frequency has effect on both the motor speed and the strength of the magnetic field. With the lowering of frequency motor speed becomes slow.
With reduction in voltage, magnetic field decreases and magnetic flux becomes constant. This keeps torque production stable, regardless of frequency.
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(a) calculate the rotational kinetic energy of earth on its axis. (b) what is the rotational kinetic energy of earth in its orbit around the sun?
The rotational kinetic energy of the earth on its axis is 2.08 x 10^29 Joules and the rotational kinetic energy of the earth in its orbit around the sun is 2.17 x 10^33 Joules.
(a) To calculate the rotational kinetic energy of Earth on its axis, we can use the formula:
KE = 0.5 * I * ω^2where KE is the rotational kinetic energy, I is the moment of inertia of the object, and ω is the angular velocity.
The moment of inertia of Earth can be calculated using the formula:
I = (2/5) * m * r^2where m is the mass of Earth and r is the radius of Earth.
Using these formulas, we can calculate the rotational kinetic energy of Earth as follows:
KE = 0.5 * [(2/5) * m * r^2] * (ω^2)
= 0.5 * [(2/5) * 5.97 x 10^24 kg * 6371 km^2] * (7.29 x 10^-5 rad/s)^2
= 2.08 x 10^29 Joules
(b) To calculate the rotational kinetic energy of Earth in its orbit around the sun, we can use the formula:
KE = 0.5 * m * v^2where KE is the rotational kinetic energy, m is the mass of Earth, and v is the velocity of Earth in its orbit around the sun.
The velocity of Earth in its orbit around the sun can be calculated using the formula:
v = √[(G * M) / r]where G is the gravitational constant, M is the mass of the sun, and r is the distance of Earth from the sun (also known as the semimajor axis of Earth's orbit).
Using these formulas, we can calculate the rotational kinetic energy of Earth in its orbit around the sun as follows:
KE = 0.5 * m * [√[(G * M) / r]]^2
= 0.5 * m * [(G * M) / r]
= 0.5 * 5.97 x 10^24 kg * [(6.67 x 10^-11 N * m^2 / kg^2) * (1.989 x 10^30
kg) / (1.496 x 10^11 m)]
= 2.17 x 10^33 Joules
Note that the rotational kinetic energy of Earth in its orbit around the sun is much greater than the rotational kinetic energy of Earth on its axis, due to the much larger velocity and mass involved in Earth's orbit around the sun.
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What acceleration does a net force of 32 N impart to a mass of; *
30 kg
45 kg
14 kg
32 kg
3 kg
0.094 m/s^2 0.94 m/s^2
O
O
O
O
1.00 m/s^2 0.44 m/s^2
O
O
O
O
O
O
O
10 points
1.41 m/s^2
O
O
This query calls for the use of Newton's second law of motion. Mass is equal to the product of acceleration and net force. Mass = 32 N / 4 m/s2 = 8 kg when the values are entered into the formula.
If an object has a mass of 10 kg and a force of 30n, what is its acceleration?We can obtain a=F/m by adopting the formula F=m*a and rearranging the subject. Then, using the provided numbers as substitutes, we can determine that a=30/10=3. The item will accelerate at 3ms-2 because acceleration is measured in ms-2.
How is force calculated?Newton's second law of motion provides the definition of the force formula: An object's force is equal to its mass times its acceleration. F = m ⨉ a. To apply this formula, you must use SI units for force (newtons), mass (kilograms), and acceleration (meters per second squared).
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different between force and work
Answer:
What are your answer choices?
Explanation:
Work is like if you are a police officer you take down enemies. Force is like if you use a negatively charged balloon next to an uncharged piece of paper, they balloon would attract each other.
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How do you calculate the current measured by ammeter?
The resistance R divided by the potential difference V yields the current I. We simply need to determine the potential difference and resistance of the circuit in order to determine the current in this ammeter, which measures the current of the circuit.
How does an ammeter calculate current?The ammeter is linked to the circuit in series. Therefore, its reading will reflect the amount of current flowing through the circuit. Consequently, the ammeter's reading is 1A.
How do you figure out current?We can easily calculate current by dividing the total charge by the measurement period. I = Q t, where I stands for current, Q for charge, and t for time, is a formula for calculating current.
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Why are some genetic diseases common?
A certain genetic ailment might be more prevalent in the group if one of these common genes contains a disease-causing variant (also known as a mutation).
How widespread are genetic disorders?A genetically based ailment will affect roughly 6 out of every 10 individuals. From minor to extremely severe genetic disorders are possible. It is believed that a delicate balance between mutation, genetic drift, and natural selection is the main reason why diseases continue to affect human populations.
Why do some genetic features tend to be more prevalent?How many copies of that gene variant (or allele) are present in the population determines how frequent a trait is. Whether a trait is dominant or recessive has little to no bearing on this.
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What happens to the tension in the string if the Ping-Pong ball is replaced by a smaller spherical object of equal weight?
a. The tension does not change.
b. The tension increases.
c. The tension decreases.
The tension in the string increases if the ping-pong ball is replaced by a smaller spherical object of equal weight.
When two opposing forces pull on a rope, string, wire, the force transmitted through the object is known as tension. The energy is pulled equally on the bodies at the ends by the tension force, which is applied along the entire length of the wire. Each physical object that comes into contact with another applies force to that object.
Weight is the gravitational pull of the large second object, like the moon or the earth on a first object.
The concepts required to solve the given question is the tension in the string.
Let us write an expression for tension in terms of volume, density of the liquid, density of the solid. Then, compare the tension on the basis of density of matter. Finally, compare the tension on the basis of the weight of the spherical ball.
The expression for the tension in terms of volume, density of liquid and density of solid is as follows,
T = V * (Pl - Ps)
where, V is the volume
Pl is the density of liquid
Ps is the density of solid
The tension in the above equation is directly proportional to volume, density of liquid, density of solid. As the density of liquid increases, the tension increases. Thus, the tension in the string neither decreases nor remains same.
After adding salt to the liquid, the density of the liquid increases.
The tension will decrease as the volume displaced will decrease.
The weight of the spherical balls is same but the volume is decreased.
The density of the solid remains constant but the density of liquid decreases. Therefore, net tension in the string neither increases nor remains same.
Therefore, tension in the string increases in the string if ping-pong ball is replaced by a smaller object of equal weight.
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what is the difference between momentum in explosion and collision by using formula
Answer:
An object being fired from a cannon is also a collision where momentum must be conserved
Which one of the following bodies is in equilibrium?
Answer: (A)
Explanation:
Constant speed = 0 ΣF = equilibrium
Apple, cart, and satellite* have imbalanced force of gravity
*gravity is acting as a centripetal force