Rollercoasters, KE & PE

the capacity necessary to do work; controls the amount of change that can occur within a system

• speed

• joule

• momentum

• energy

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energy cannot be created or destroyed, only transferred

• Law of conservation of matter

• Law of conservation of energy

• Law of energy transfer

• Law of the universe

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the standard international unit for energy

• newton

• joule

• kilogram

• m/s/s

Levels of kinetic energy are most influenced by:

• Mass

• Speed

• Distance

• Time

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Check off all the direct variables you need to find kinetic energy:

• Speed

• Distance

• Time

• Mass

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At the top of the highest point/peak on a roller coaster, how is the energy split between potential and kinetic energy?

• 100% PE, 0% KE

• 0% PE, 100% KE

• 50% PE, 50% KE

• 25% PE, 75% KE

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A bowling ball is rolling down a hill, about three-quarters of the way down, the bowling ball has 20 J of PE, and the total energy of the system is 80J. How much KE is in the system?

• 40 KE

• 100 KE

• 60 KE

• 80 KE

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Which of the following statements is correct?

• The car has less kinetic energy because it has more mass than the girl.

• The car has the most kinetic energy because it has more mass than the girl.

• The car and the girl have the same amount of kinetic energy because they are moving at the same speed.

• The girl has the most kinetic energy because she has less mass than the car.

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What can you say about the potential energy of the two sleds shown above?

• Sled B has more potential energy.

• There is not enough information to know which sled has more potential energy.

• The two sleds have the same potential energy.

• Sled A has more potential energy.

Car 1 and Car 2 have the same mass. Which of the following statements is true?

• Car 1 has the most kinetic energy because it is moving at a faster rate of speed.

• Car 2 has the least amount of kinetic energy because it is actually smaller than car one.

• Car 2 has the most kinetic energy because it is moving at a slower rate of speed.

• Car 1 has the least amount of kinetic energy because it is moving at a faster rate of speed.

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