Work, Energy, Power

When a rubber band is stretched and then released, energy conversion is from

• Elastic Potential to Gravitational Potential

• Kinetic to Elastic Potential

• Kinetic to Gravitational Potential

• Elastic Potential to Kinetic

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The area under a force vs. displacement graph tells you the

• mass of the object

• momentum of the object

• work done on the object

• impulse of the object

If you pull the trolley vertically upwards using a crane. Which force do you use to calculate the work done?

• Weight

• Pulling force

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At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

• A

• B

• C

• D

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SI unit for POWER is

• Watts

• Joules

• Newtons

• Horseriding

If you increase your work and decrease your time, you will have

• more power

• less power

• same amount of power

• power rating can not be determined

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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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

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NGSS.MS-PS3-2

Wile E. Coyote eats a healthy breakfast before running after the Roadrunner. What is the energy transformation?

• Chemical potential to kinetic

• Kinetic to gravitational potential

• Elastic to kinetic

• Chemical potential to thermal

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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