the transfer of force over a distance

the change in distance in a given time

transfer a force through a distance

What is the definition for kinetic energy?

the energy of motion (due to mass and velocity)

Two equal mass marbles are at the top of a ramp. One marble falls to the ground off the back while the other rolls down the ramp. What is true about the marbles when they reach the ground?

The two marbles are moving with the same speed.

The marble that rolled down the ramp is moving faster than the marble that fell.

The marble that fell down the back of the ramp is moving faster than the marble that rolled.

The marble that rolled down the ramp is not moving when it reaches the ground.

A block starts at rest at point P at the top of a ramp which is height h above the ground. The block slides down one side and up the other, stopping at a point less than h above the ground.

The block did not go as high on the other side because work from friction made the mechanical energy less.

The block did not go as high on the other side because gravity pulls down.

The block did not go as high on the other side because potential energy always has to decrease.

The situation as described is impossible to happen.

Where is the roller coaster gaining potential energy?

The roller coaster is always losing potential energy

How does conservation of energy explain why something that is falling should speed up?

It gains kinetic energy because it loses potential energy.

It gains kinetic energy because it gains potential energy.

It loses kinetic energy because no work was done on it.

It loses kinetic energy because the Earth gains potential energy.

What is mechanical energy?

total kinetic and potential energy

If two rocks are launched through the air at the same speed, but one has twice as much mass as the other, how do their kinetic energies compare?

The rock with the greater mass has more kinetic energy than the rock with less mass even though they are traveling at the same speeds because both mass and speed affect kinetic energy.

The kinetic energy of the two rocks is the same because they have the same speed

The rock with the greater mass will only move a small distance and then fall straight to the ground

The two rock could not have the same speed if they have different masses

What would happen to the kinetic energy of an object if you doubled the mass?

The kinetic energy would double

The kinetic energy would be cut in half

The kinetic energy would triple

It would stay the same because mass does not effect kinetic energy

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

The potential energy decreases while the kinetic energy increases

Both the potential energy and kinetic energy decrease

The kinetic energy decreases while the potential energy increases

Both the potential energy and kinetic energy increase

Work, Energy and Power

Authored by Dhanunjay Palla

Physics

9th Grade

NGSS covered

Used 56+ times

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Work done = Force x _________

a. distance

b. acceleration

c. velocity

d. speed

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The unit used to measure work is the

Watt

Newton

Joule

meter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A force exerted over a distance to move an object is ______________________.

power

work

momentum

Watt

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The unit used to measure power is the

Watt

Newton

Joule

Newton*meter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 5000N block is lifted 10 m. How much work was done?

50000 J

5000 J

500 J

50 J

W=125 J
d=10 m
F=???

12.5 N

1250 N

0.08 N

135 N

If 150 Joules of work is needed to move a box 10 meters, what force was used?

1500 N

15 N

1.5 N

150 N

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