Work and Energy Review Quiz

A shopping cart slows as it moves along a level floor. Which statement describes the energies of the cart?

• the kinetic energy increases and the gravitational potential energy remains the same

• the kinetic energy increases and the gravitational potential energy decreases

• the kinetic energy decreases and the gravitational potential energy remains the same

• the kinetic energy decreases and the gravitational potential energy increases

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

If the speed of a moving object is doubled, the kinetic energy of the object is

• halved

• doubled

• unchanged

• quadrupled

Tags

NGSS.MS-PS3-1

A 1 kg ball is dropped from the top of a building. Just before striking the ground, the ball's speed is 12 m/s. What was the ball's gravitational potential energy, relative to the ground, at the instant it was dropped?

• 6 J

• 24 J

• 72 J

• 144 J

Tags

NGSS.MS-PS3-2

Which statement describes the kinetic energy and total mechanical energy of a block as it is pulled up an incline at constant speed?

• kinetic energy decreases and total mechanical energy increases

• kinetic energy decreases and total mechanical energy remains the same

• kinetic energy remains the same and total mechanical energy increases

• kinetic energy remains the same and total mechanical energy remains the same

Tags

NGSS.MS-PS3-5

A spring gains 2.34 J of elastic potential energy as it is compressed 0.250 meters from its equilibrium position. What is the spring constant of the spring?

• 9.36 N/m

• 18.7 N/m

• 37.4 N/m

• 74.9 N/m

Tags

NGSS.MS-PS3-2

How much work is required to lift a 10 N weight from 4 meters to 40 meters above the surface of the Earth?

• 2.5 J

• 3.6 J

• 360 J

• 400 J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

If a motor lifts a 400 kg mass a vertical distance of 10 meters in 8 seconds, the minimum power generated by the motor is

• 320 W

• 500 W

• 4900 W

• 32,000 W/

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

A baseball bat strikes a ball with an average force of 20,000 N. If the bat stays in contact with the ball for a distance of 0.005 m, what kinetic energy will the ball acquire from the bat?

• 100 J

• 200 J

• 25 J

• 400 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS3-4

NGSS.MS-PS2-2

As a block slides across a table, its speed decreases while its temperature increases. Which two changes occur in the block's energy as it slides?

• a decrease in kinetic energy and an increase in internal energy

• an increase in kinetic energy and a decrease in internal energy

• a decrease in both kinetic energy and internal energy

• an increase in both kinetic energy and internal energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS1-4

A 1 kg box slides down a frictionless incline, starting from rest. As the box slides, the sum of its gravitational potential energy and kinetic energy

• decreases

• increases

• remains the same

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS3-2