Speed and Energy

1) 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 bowl 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 speed.

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2) Fill in the blanks using the available answer choices.

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

• potential

• kinetic

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3) Stretching a coil or spring increases its ________.

• potential energy

• kinetic energy

• direction

• speed

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4) Because jaguars can run faster than sloths they move with more ___________ energy than sloths.

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5) Suppose you are riding a bike. As you increase speed, your ____________.

• energy of motion increases

• energy of motion decreases

• stored energy increases

• energy is used up

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6) 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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7) 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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8) Which is NOT evidence of 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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9) The energy of motion (kinetic energy) is ___________

• determined by an object's position above a surface

• not determined by an object's position above a surface

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10) There are two ramps with books standing at the bottom. One ramp is taller than the other. If you roll a ball down each ramp, which ball will hit the books harder? Explain your answer with complete sentences.

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