Work Energy Power Review

A ball rolls to the top of a frictionless hill. What is the energy transformation?

• gravitational potential to kinetic

• kinetic to thermal

• kinetic to gravitational potential

• chemical potential to kinetic

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A child is at the top of a smooth slide and then slides down. At the bottom, the child comes to a stop when they reach the grass. What is the energy transformation?

• elastic potential to kinetic to gravitational potential

• gravitational potential to kinetic to elastic potential

• kinetic to gravitational potential to kinetic

• gravitational potential to kinetic to thermal

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

A rock falls off a table and lands on a spring, squishing it. What is the energy transformation?

• gravitational potential to kinetic to gravitation potential

• kinetic to elastic potential to gravitational potential

• gravitational potential to kinetic to elastic potential

• chemical to thermal

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

A 3.0 kg ball is on a table 1.5 m above the ground. What is its gravitational potential energy?

• 4.5 J

• 44.1 J

• 3.4 J

• 29.4 J

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NGSS.MS-PS3-2

What is the kinetic energy of a 12 kg dog running at 3 m/s?

• 36 J

• 353 J

• 54 J

• 118 J

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NGSS.MS-PS3-1

How much work is needed to push a resting 20 kg crate to a velocity of 5 m/s?

• 15 J

• 250 J

• 300 J

• 100 J

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

50 J of work is done lifting a 2.0 kg book in the air. How high was it lifted?

• 2.6 m

• 3.6 m

• 1.0 m

• 25 m

How much energy is used by a 100 W light bulb over 1 hour?

• 100 J

• 36,000 J

• 360,000 J

• 240,000 J

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?

• Bobby

• Carol

• They did the same amount of work

• Not enough information

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who used more power?

• Bobby

• Carol

• They did the same amount of work

• Not enough information