Calculating Kinetic Energy II

KE is directly proportional to an object's mass because it ____________.

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NGSS.MS-PS3-1

KE is directly proportional to the square of the object's speed, so it ____________.

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NGSS.MS-PS3-1

If the speed is doubling, what happens to the kinetic energy?

• it doubles

• it stays the same

• it triples

• it quadruples

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NGSS.MS-PS3-1

Where would this tossed baseball have the greatest amount of kinetic energy? (Hint: where is it moving the fastest?)

• point W

• point X

• point y

• point z

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Look at the y-axis (the one labeled Kinetic Energy) on the left. What is the unit used to measure energy?

• Newton (N)

• Kilogram (kg)

• Joule (J)

• Meters per second (m/s)

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NGSS.MS-PS3-1

Look at this graph showing kinetic energy and speed of a moving object. Which of the following can be concluded from the graph?

• Kinetic energy only changes when speed changes

• Speed is only related to the size of an object.

• All moving objects have the same kinetic energy.

• Kinetic energy increases as speed increases

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NGSS.MS-PS3-1

Why is it harder to stop a four-person bobsled than a three-person bobsled?

• the four-person sled has more KE

• the four-person sled has less KE

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

As the velocity of an object decreases its KE will...

• increase

• decrease

• stay the same

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

As mass increases, KE ...

• increases

• decreases

• stays the same

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NGSS.MS-PS3-1

Kinetic energy is...

• energy carried in ultraviolet waves

• energy stored in food

• energy in motion

• energy from splitting an atom

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NGSS.MS-PS3-1

NGSS.MS-PS3-5