Energy and Speed Lesson 2 Review

Which is evidence that a bowling ball has more energy when it is moving faster than when it is moving slower?

• The bowling ball has a larger mass when it is moving faster than when it is moving slower.

• The bowling ball can knock over more pins when it is moving faster than when it is moving slower.

• The bowling ball will reach the pins in less time when it is moving faster than when it is moving slower.

• A bowling ball can knock over more pins than a soccer ball moving at the same speeed.

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The ____________ energy of a roller coaster is the energy of its motion

• potential

• kinetic

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Stretching a coil or spring increases its

• potential energy

• kinetic energy

• direction

• speed

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Because jaguars can run faster than sloths they move with more_________ energy than sloths

• Kinetic

• Potential

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Suppose you are riding a bike. As you increase your speed, your________

• energy of motion increases

• energy of motion decreases

• stored energy increases

• energy is used up

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How can the speed of a dropped ball be increased?

• Roll it down a hill instead to increase the amount of friction

• Drop a larger ball to increase the amount of friction

• Decrease the height from which it is dropped to give it more potential energy.

• Increase the height from which it is dropped to give it more potential energy.

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Fill in the blanks using the available answer choices.

If the amount of kinetic energy an object has is____, then the object will move faster.

• increased

• decreased

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Which is NOT evidence fo what happens during a roller coaster ride?

• As the cars go down the hill, the energy of motion increases

• As the cars pull to the top of the first hill, the potential energy increases

• as the cars slow down at the end of the ride, energy of motion decreases

• as the cars pull to the top of the first hill, the potential energy decreases.

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The energy of motion is___

• determined by an objects position above a surface

• increased as your speed decreases

• decreased as your velocity increases

• not determined by an objects position above a surface

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Energy is the ability to do work

• true

• false

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