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Answer:

v=59[m/s]

Explanation:

To solve this problem we must use the principle of conservation of energy, which tells us that energy is transformed from Kinetic to potential or vice versa. At the moment when the car is at the top before falling down the cliff, we have the car moving at speed 50 [m/s] (kinetic energy) also it is 50 [m] above ground level (potential energy).

[tex]E_{k1}+E_{p1}=E_{k2}\\[/tex]

where:

Ek1 = kinetic energy before falling [J]

Ep1 = potential energy before falling [J]

Ek2 = kinetic energy in the ground [J]

The potential energy can be calculated by means of the following equation.

[tex]E_{p}=m*g*h[/tex]

where:

m = mass = 500 [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 50 [m]

Whereas the kinetic energy can be calculated by means of the following equation.

[tex]E_{k}=\frac{1}{2}*m*v^{2}[/tex]

where:

v = velocity = 50 [m/s]

Now replacing in the general equation:

[tex]\frac{1}{2} *500*(50)^{2} +500*9.81*50=\frac{1}{2} *500*v^{2}\\625000+245250=250*v^{2} \\250*v^{2} =870250\\v=\sqrt{870250/250} \\v=59[m/s][/tex]

Answer:

The formula for moment of inertia is the “sum of the product of mass” of each particle with the “square of its distance from the axis of the rotation”. The formula of Moment of Inertia is expressed as I = Σ miri2.

Explanation:I hope it helped

Answer:

Your power output as you climb the stairs is 300.92 Watts.

Explanation:

Power is the amount of work per unit of time that some object or system produces. Power is calculated by:

[tex]P=\frac{W}{t}[/tex]

Power is measured in watts (W), equivalent to one joule (J) of work done per second (s).

Work is defined in physics as the force that is applied to a body to move it from one point to another. The work is calculated as the multiplication of the force by the distance:

Work = F*d

Newton's second law says that the acceleration of a body is proportional to the resultant of forces on the acting and inversely proportional to its mass. This is expressed by the equation:

F=m*a

In this case,  

considering that the force of gravity acting on you, the force is:

F=m*a= 72.5 kg * 9.8 [tex]\frac{m}{s^{2} }[/tex] =710.5 N

The distance is the multiplication between the number of stairs and the height of the stairs in meters (18 cm= 0.18 m, being 100 cm= 1 m):

d = 40 * 0.18 m= 7.2 m

Then:

Work= 710.5 N* 7.2 m

Work= 5,115.6 J

So finally the power can be calculated as:

[tex]P=\frac{5,115.6 J}{17s}[/tex]

P= 300.92 Watts

Your power output as you climb the stairs is 300.92 Watts.

Answer:

The correct answer is B. your weight

Explanation:

Newton's third law states that every action has an equal and opposite reaction. You may not think this, but when you're standing on the floor, you are exerting a force against the floor: your weight, caused by gravity, is pulling you down. The floor is reacting by pushing back: we call this force the reaction force. -Google

Answer:

kkk

Explanation:

Answer:

A

Explanation:

i think

Answer:

Explanation:

Step one:

given data

extension= 40cm

Spring constant K= 52.9N/cm

Step two:

Required

the Kinetic Energy KE

the expression to find the kinetic energy is

KE= 1/2ke^2

substituting our data we have

KE= 1/2*52.9*40^2

KE=0.5*52.9*1600

KE= 42320Joules

The answer is b) 4230 J

Answer:

effects of gravity on the Moon and Earth

Explanation:       Newton found the Moon's inward acceleration in its orbit to be 0.0027 metre per second per second, the same as (1/60)2 of the acceleration of a falling object at the surface of Earth.

Answer:

400km/50h = 90m/s..

Explanation:

..

Given the distance covered and time elapsed, the speed of the object represented by the graph is 8km/hr.

Speed is simply referred to as distance traveled per unit time.

Mathematically, Speed = Distance ÷ time.

Given the data in the question;

Speed = Distance ÷ time

Speed = 400km ÷ 50hrs

Speed = 8km/hr

Given the distance covered and time elapsed, the speed of the object represented by the graph is 8km/hr

Learn more about speed here: brainly.com/question/7359669

#SPJ2

Answer:

The answer is "Option 5".

Explanation:

Jadeen claims that only by hitting the wire to make it thinner and wider, it can improve a copper wire's strength, which is why a copper wire's permeability doesn't quite improve and can reduce once it is pounded. Arnell says so by heating its wire, it can improve its strength, and when it is heated, the wire's permeability reduces.

Answer:

Carbon dioxide/CO2

Explanation:

i-

Answer:

I think Carbon Dioxide

Explanation:

Because When fossil fuels are burned carbon and hydrogen react with oxygen in air to carbon dioxide (CO2) and water (H2O).

Answer:

Solar energy? Solar rays? Solar Power?

Explanation:

not too sure what you mean, its kinda in the sentence. lmk if you need any help however

Answer:

Solar system is the energy output from the sun

Answer: Storm Chasing/ Persistent Forecasting/ Long-Range Forecasting

Explanation:

Storm chasing is identification of the severe weather condition for the purpose of scientific investigation.

Persistent forecasting can be defined as the standard of comparison of the weather forecasting skills.

Long range forecast can provide the expected the condition of the atmospheric and oceanic condition.

Answer:

Persistent Forecasting/ Now-casting/ Short Term Forecasting

Explanation:

i just took the test and got it right. Happy holidays. Hope i helped. Maybe i can get brainlist??:)

Answer:

a = 0m/s²

Explanation:

Average acceleration = (change in velocity)/(time it takes). Since the car's change in velocity is zero, its acceleration is zero.

Answer:

1⁺ ion

Explanation:

Metals in the first group on the periodic table will prefer to form 1⁺ ion. This is because the 1 valence electron in their orbital.

Most metals are electropositive and would prefer to lose electrons than to gain it.

Like all metals, the group 1 elements called the alkali metals would prefer to lose and electron.

On losing an electron the number of protons is then greater than the number of electrons. This leaves a net positive charge.

Answer:

0.872m/s

Explanation:

Tangential velocity is given by the formula,

[tex]v= 2\pi r/ t[/tex]

In the question given,

radius= 25meters

time= 180secs

pie= 3.14

number of laps= 1

The magnitude of tangential velocity equals;

[tex]\frac{1lap* 2 *3.14 *25m}{180secs}[/tex]

v = 157m/180secs

Therefore, the magnitude of the tangential velocity

=0.872m/secs

Answer:

C) The force experienced by the ball equals the force experienced by the club.

Explanation:

When the golfer strikes the ball with his club, the club exerts a force on the ball. Due to Newton's Third Law Of Motion [Every Action has an equal and opposite reaction], the ball also exerts an equal force on the club. However,

As the mass of the club is usually greater than the mass of the ball, it accelerates slower; While the ball way faster, following the equation : F=ma

Answer:

velocity and acceleration are zero.​

When a ball is thrown exactly straight up in the air, at its highest point, velocity and acceleration are zero.​

This is because, at the ball's highest point, the ball is not moving in any direction meaning the vector quantity (direction and magnitude) is zero for both velocity and acceleration.

Answer:

B. The magnet has magnetized the right side of the block.

Explanation:

a pe x

Answer:

The distance is [tex]r = 55430496 \ m[/tex]  

Explanation:

From the question we are told that

   The period of the moon [tex]T = 1.2 days = 1.2 * 24 * 3600 = 103680 \ s[/tex]

    The mass of the planet is  [tex]m_p = 9.38*10^{24} kg[/tex]

Generally the period of the moon is mathematically represented as

       [tex]T = 2 * \pi * \sqrt{ \frac{r^3 }{ G * m_p } }[/tex]

Here G is the gravitational constant with value

        [tex]G = 6.67 *10^{-11} \ N \cdot m^2/kg^2[/tex]

=>   [tex]T = 2 * \pi * \sqrt{ \frac{r^3 }{ G * m_p } }[/tex]

=>   [tex]103680 = 2 * 3.142 * \sqrt{ \frac{r^3 }{ 6.67*10^{-11} * 9.38*10^{24} } }[/tex]

=>    [tex]272218492.31 = \frac{r^3}{ 6.67 *10^{-11} * 9.38*10^{24}}[/tex]

=>    [tex]r = \sqrt[3]{ 1.7031241*10^{23}}[/tex]j

=>   [tex]r = 55430496 \ m[/tex]        

Answer:

Continuous

Explanation:

A circuit can only light up a lightbulb if there is a continuous path for electricity to travel from one end of the energy source to the other end.

Answer:

continuios

Explanation:

Answer:

This is due to the eye piece consisting of a diverging lens

Explanation:

Galilean telescope have a narrower field of view than an Keplerian telescope with the same size lenses due to the eye piece consisting of a diverging lens while the Keplerian telescope eye piece has a converging lens.

The presence of a converging lens in the Keplerian telescope enables it to have a larger angle difference while the Galilean telescope diverging lens enables it to have a smaller angle difference which explains its narrow field of view.

Answer:

Non-uniform velocity as the laser light beam has got reflected by the mirror

And as the light got reflected there is a change in velocity making it non-uniform velocity

Answer:

The minimum gauge pressure you must produce in your lung is -3.356 x 10⁻³ atm

Explanation:

Given;

density of the lemonade, ρ = 1000 kg/m³

maximum height of the lemonade, h₂ = 3.47 cm = 0.0347 m

The minimum gauge pressure you must produce in your lung is given by  Bernoulli’s equation;

P₂ + ρgh₂ = P₁ + ρgh₁

P₂ = P₁ + ρgh₁ - ρgh₂

P₂ = P₁ + ρg(h₁ - h₂)

P₂ = P₁ + ρg(0 - h₂)

P₂ = P₁ - ρgh₂

P₂ = 0 -  ρgh₂

P₂ = -  ρgh₂

P₁ = -(1000)(9.8)(0.0347)

P = -340.06 N/m²

The gauge pressure (in atmospheres) is given as;

P = -340.06 / 101325

P = -0.003356 atm

P = -3.356 x 10⁻³ atm

Therefore, the minimum gauge pressure you must produce in your lung is -3.356 x 10⁻³ atm

Increase of momentum of the collision will have the car in a unsettling position, creating an unsettling spot for it. Moreover increasing this would most likely take worse effect, it is better than increasing the time, which will only create the car faster. Let me show you what I mean...

Explanation:

solar energy is the answer

Answer:

it's an affordable high school I guess that's what it say look at the picture

Answer:

3.34×10^-6m

Explanation:

The shear modulus can also be regarded as the rigidity. It is the ratio of shear stress and shear strain

can be expressed as

shear stress/(shear strain)

= (F/A)/(Lo/ . Δx)

Stress=Force/Area

The sheear stress can be expressed below as

F Lo /(A *Δx)

Where A=area of the disk= πd^2/4

F=shearing force force= 600N

Δx= distance

S= shear modulus= 1 x 109 N/m2

Lo= Lenght of the cylinder= 0.700 cm=7×10^-2m

If we make Δx subject of the formula we have

Δx= FLo/(SA)

If we substitute the Area A we have

Δx= FLo/[S(πd^2/4]

Δx=4FLo/(πd^2 *S)

If we input the values we have

(4×600×0.7×10^-2)/10^9 × 3.14 ×(4×10^-2)^2

= 3.35×10^-6m

Therefore, its shear deformation is 3.35×10^-6m

A=area of the disk= πd^2/4

= [3.142×(4×10^-2)^2]/4

Answer:

Vector

Explanation:

Vector is a quantity that shows the direction or path through which a body travels with as it changes position.

As body travels, the direction sometimes changes and this is described by the vector of the body.

Velocity is a vector quantity that describes the displacement per unit of time of a body.

Speed is a scalar that deals with the distance covered per time

So, a vector specifies the magnitude of a physical quantity and also the direction through which it travels.

Answer:

BOTH the size of the force AND the mass of the object

Explanation:

Acceleration of an object is the rate of change of its velocity.

The relation between force, mass and acceleration is given by the formula as follows :

F = ma

m is mass

a is acceleration

It would mean that the change in motion or the acceleration of an object depends on both the size of the force and the mass of the object. Hence, the correct option is (c).