The applied force is parallel to the ground, so the net vertical force on the sled is 0. By Newton's second law, this means the normal force and weight of the sled cancel out:
n - w = 0
n = w
n = m g
n = (15.7 kg) (9.80 m/s²)
n = 153.86 N
A string of length 4m is extended by 0.02m, when a load of 0.4kg is suspended at its end. What will be the length of the string, when the applied force is 15N
Answer:
ima have to say c
Explanation:
or A or B or D choose ur best answer
What is the momentum of a 10 kg object traveling at 4 m/s?*
Answer:
40kg.m/s
Explanation:
∆p=mv. 10kg*4m/s. ∆p= 40Nm
Formed at the boundary of two converging continental tectonic plates is called a Mountain formation
True
False
Answer:
True
Explanation:
At the boundary of two converging continental tectonic plates, a mountain is formed. This is because the collision results in the emergence of mountains.
The density of both plates are nearly similar and lesser than that of the mantle below. This makes the two plates grind together and bulge upward. The Himalaya mountain range is one of such example. In a continental - continental crust collision, mountains are formed.As the grinding continues, the builds upward more and more.
Why does the Moon seem to change shape?
A.
As the Moon revolves
around Earth, different parts are lit by the Sun.
B.
The viewpoint from Earth of the illuminated side of the Moon changes.
C.
Earth's shadow is blocking light from the Sun.
D.
The way the Moon produces light changes, so we see different shapes.
Answer:
A
Explanation:
A spacecraft orbiting Earth is both moving forward and
a. at terminal velocity
b. experiencing resistance
c. weightless
d. towards earth
Answer: (A) At terminal velocity ...
Explanation:
plssssssssssssssssssssssss help
Answer:
I think it's b
Explanation:
........
In the picture below, label which particle is the solute and which is the solvent
A pirate fires his cannon parallel to the water but 3.5 m above the water. The cannonball leaves the cannon with a velocity of 120 m/s. He misses his target and the cannonball splashes into the briny deep. How far did the cannonball travel? (please show work)
Answer:
202.8m
Explanation:
Given that A pirate fires his cannon parallel to the water but 3.5 m above the water. The cannonball leaves the cannon with a velocity of 120 m/s. He misses his target and the cannonball splashes into the briny deep.
First calculate the total time travelled by using the second equation of motion
h = Ut + 1/2gt^2
Let assume that u = 0
And h = 3.5
Substitute all the parameters into the formula
3.5 = 1/2 × 9.8 × t^2
3.5 = 4.9t^2
t^2 = 3.5/4.9
t^2 = 0.7
t = 0.845s
To know how far the cannonball travel, let's use the equation
S = UT + 1/2at^2
But acceleration a = 0
T = 2t
T = 1.69s
S = 120 × 1.69
S = 202.834 m
Therefore, the distance travelled by the cannon ball is approximately 202.8m.
The input work done on a machine is 9.63 × 103 joules, and the output work is 3.0 × 103 joules. What is the percentage efficiency of the machine?
Answer:
31.15%
Explanation:
The formula used was
((Work output)/(Work input))×100
Answer:
C. 31.1 percent
What rules are used to balance a chemical equation?
Answer:
Count the number of hydrogen and oxygen atoms on each side of the arrow.
Explanation:
Which does not represent a change in velocity?
Group of answer choices
A person is riding a bicycle at 4 m/s west and decreases her speed to 3 m/s.
A plane is flying south at 600 km/h and then flies directly upwards before returning to the airport.
A balloon is floating up into the air at 1 m/s.
A bus is traveling west at 2 m/s and then turns a corner.
Answer:
A balloon is floating up into the air at 1 m/s.
Explanation:
Velocity is the displacement divided by the time;
Velocity = [tex]\frac{displacement}{time}[/tex]
It is a vector quantity that has magnitude and direction.
The choice that shows a change in direction is a correct specification of velocity.
A balloon floating up into the air at 1m/s shows no directional change.
Calculate the pressure created when a force of 200N is applied over an area of 20
m2
Answer:
10 pa
Explanation:
Pressure = Force / Area
Pressure = 200 / 20
Pressure = 10 pa
I NEED HELP WITH THIS ASAP!!! Wet Lab - Coulomb's Law lab from edge!!
Answer:
Srry for the delay but this might help ppl in the future
Explanation:
PEACE OUT!
Need help immediately please
(6.2 x 1018m) (4.7 x 10-1°m)
Answer: (6.2 x 10^18m) (4.7 x 10^-10m)
multiply the decimal numbers first: 6.2 x 4.7 = 29.14
multiply the base ten numbers by adding the exponents:
10^18m x 10^-10m = 10^8m
now you have:
29.14 x 10^8m
that's it -- unless you need to write the final answer in scientific notation. If so, you have to adjust the exponent for the base 10 to get:
2.914 x 10^(8m+1)
;)
Explanation:
A 4V source is connected across a 2μF capacitor. Find the charge on this capacitor.
Answer: [tex]8[/tex] μc
have: 2μF = [tex]2.10^{-6}[/tex] F
the charge on this capacitor is [tex]2.10^{-6}.4=8.10^{-6}(c)=8[/tex](μc)
Explanation:
Two cars are on a track and accelerate to 60 mph. At a certain point, both cars slam on the brakes. The distance it takes for each car to stop is then measured.
3. Name the independent variable:
4. Name the dependent variable:
Answer:
'distance' is a 'dependent' variable, and 'stopping' distance is 'an independent' variable.
Explanation:
As we know the independent variable is basically the variable the independent variable is the variable the researcher or a lab person tends to change or control, and its tendency to have a direct effect on the dependent variable.
In this example, two cars are on a track and accelerate to 60 mph. At a certain point, both cars slam on the brakes. The distance it takes for each car to stop is then measured.
It means the 'covering' distance depends upon where the cars tend to stop. It can be a long-distance depending upon how fat the cars go before both cars slam on the brakes.
Therefore, 'distance' is a 'dependent' variable, and 'stopping' distance is 'an independent' variable.
A ball projected horizontally from 180meter tall building lands 450 meter away from the foot of the building find velocity of the ball after leafs the building find velocity of the ball after it leafs the building
Answer:
74.28 m/s
Explanation:
In this case, it is a zero launch angle in that the object is launched horizontally at a height H.
The formula to apply is:
[tex]R=v_o*\sqrt{\frac{2H}{g} }[/tex]
where
R= range, 450 m
H= height of building ,180 m
g= 9.81
vo= ? initial velocity
Applying the values to the equation;
[tex]450 = v_o*\sqrt{\frac{2*180}{9.81} } \\\\450=v_o*\sqrt{36.70} \\\\450=v_o*6.06\\\\450/6.06 = v_o\\\\74.28 m/s=v_o[/tex]
How do we define energy efficiency?
A. The ratio of the actual output energy to the input energy
B. The ratio of the power gain to power loss
C. The product of input power and output power
D. The sum of potential and kinetic energy
Answer:
it is b bro that's what it is
why is it not advisable to touch a canvas tent from inside when it is raining?
Answer: When you touch wet canvas, surface tension will draw water to your finger. However, the drop left behind where you touched, like any irregular point on an overhead surface, will draw condensation from inside the tent if it is humid.
Find the force of an object is the mass is 2 kg and the acceleration is 5 m/s2.
Answer:
10 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 2 × 5
We have the final answer as
10 NHope this helps you
If a dog ran at 5m/s,how far would it run in 45 s?
Answer:
225 meters
Explanation:
45*5 or 225 meters.
Hope this helps plz hit the crown :D
An object moving in the +x axis experiences an acceleration of 2.0 m/sec2 This means the object is
Answer:
When we say that an object moving in the +x axis experiences an acceleration of 2.0 m/sec2, it really means the object is increasing its velocity by 2.0 m/s in every second.
Explanation:
As we know that Acceleration is the rate of change of velocity with respect to time, in terms of both speed and direction.
i.e.
a = Δv/Δt
so when we say that an object moving in the +x axis experiences an acceleration of 2.0 m/sec2, it really means the object is increasing its velocity by 2.0 m/s in every second.
In a tug of war, when one team is pulling with a force of 80 N and the
other 60 N, what is the net force?
Answer:
The net force is 20N in the direction of the 80N force.
Explanation:
The net force is the resultant force acting on a body. This force is that singular force that will have the same magnitude and effect as the network of forces on a body.
In this problem:
Force 1 = 80N
Force 2 = 60N
Net force = Force 1 - Force 2
Net force = 80N - 60N
Net force = 20N
The net force is 20N in the direction of the 80N force.
What is operating a vocation
Answer:
(I UNDERLINED AND MADE ITALIC THE MOST IMPORTANT INFORMATION) A vocation is an occupation to which a person is especially drawn or for which they are suited, trained, or qualified. Though now often used in non-Latin vocātiō 'a call, summons')religious contexts, the meanings of the term originated in Christianity. (from
Explanation:
A call, summons, or impulsion to perform a certain function or enter a certain career, esp. a religious one. Vocation is defined as a call to do something, especially regarding religious work. The woman's desire to become a nun is an example of vocation. a strong impulse or inclination to follow a particular activity or career. a divine call to God's service or to the Christian life. a function or station in life to which one is called by God: the religious vocation; the vocation of marriage. There are many different types of vocations in today's society. The three significant vocations are, single life, married life, and religious life. Single life is one of the three types of vocation. Definition of Vocation and Career: Vocation is what you strive to do in your life. It is the career you want to be in. Career, on the other hand, is a series of jobs, even change of professions, in a lifetime of an individual. Vocation is literally your "calling", what you are good for or destined for. It usually is a property/talent/predisposition of your person. A mission, in contrast, is a particular task given to you. Even if you are on "a mission from God", there may be retirement from it eventually.
Bicycle A with mass 40 Kg is traveling with a velocity of 4 m/s and Bicycle B with mass 20 Kg is traveling with a velocity of 2m/s. The two bicycles have kinetic energy
Calculate it and state which bicycle has higher energy and why?
Answer:
bicycle A has a greater K.E.
Explanation:
K.E = 1/2mv²
bicycle A = 1/2 × 40 × 4² = 320J
bicycle B = 1/2 × 20 × 2² = 100J
bicycle A has a greater K.E. because it has bigger mass and moves with faster velocity
This graph shows the acceleration of a racehorse taking off from the starting gate. By how much did the horse’s speed increase between 4 seconds and 6 seconds?
Explanation:
This graph shows the acceleration of a racehorse taking off from the starting gate. By 27m/sin horse’s speed increase between 4 seconds and 6 seconds?
A friend tells you she is having trouble sleeping and feels really stressed. What lifestyle change would you suggest to reduce these problems?
Answer: I personally recommend less screen time. As the Hollidays are approching, maybe spend time hanging decorations or going on hikes.
Explanation:
Answer:
1. Ask her if there's anything going on in her life that she would like to talk to you about.
2. Make sure she drinks lots of water and eats the right amount of food. Not treating your body right will mostly make you feel stressed.
3. Make sure she's staying active. Staying indoors, watching TV 24/7 with the doors closed, and over-eating is very unhealthy. Germs can also build-up and cause infections which would lead you to feel uneasy.
4. And most importantly, make sure she's not in a rocky relationship.
Please help! Will mark Brainliest :)
Answer:
i have to say whether its correct or wrong yep
Answer:
C) The direction the car is traveling
Explanation:
Velocity is a vector that contains both direction and magnitude (Speed)
We already know the magnitude... all you need is the direction.
Hope this helps :)
A girl is riding her bike at a speed of 12 m/s. She weighs 55 kg and her bike weighs 22 kg. What is the KE of the girl and her bike?
Answer:Kinetic energy of the girl and her bike is 5.544 kJ
Explanation:
Given that a girl is riding bike at speed of 12m/s
Also, mass of Girl is 55kg and mass of bike is 22kg
Let, Total mass of girl and bike be M=22+55=77kg
Now, Kinetic energy is given by K=
Hence, Kinetic energy of the girl and her bike will be
K=
K=
K=5544J
Thus, Kinetic energy of the girl and her bike is 5.544 kJ