Kinetic Energy Transfer

If an object slows down, what happens to its kinetic energy?

• The kinetic energy decreases

• The kinetic energy is converted into potential energy

• The kinetic energy increases

• The kinetic energy remains constant

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When the brakes on a bike are applied, what happens to the kinetic energy of the bike?

• It transforms into potential energy

• It decreases

• It increases

• It stays the same

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What happens to the kinetic energy of a bike when a person pedals faster?

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Energy is transferred from _______ potential energy to kinetic energy when moving down a hill.

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This type of energy is caused by motion.

• kinetic

• potential

• solar

• electrical

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The faster an object moves, the greater its ________ energy is.

• kinetic

• potential

• solar

• electrical

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Which graph BEST shows the relationship of kinetic energy (solid line) to potential energy (dotted line) as a hawk dives downward toward its prey and then returns to its original position in the air?

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A ball is projected into the air. Describe the change(s) in potential and kinetic energy.

• Potential energy decreases and kinetic energy increases.

• Kinetic energy increases and potential energy decreases.

• Potential energy decreases while kinetic energy increases; then kinetic energy decreases and potential energy increases.

• Kinetic energy decreases as potential energy increases; once at the top, potential energy decreases as kinetic energy increases.

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The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

• potential to kinetic

• sound to mechanical

• mechanical to heat

• kinetic to potential

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A new cannon was being developed in a science lab. The instructor wanted to do some testing of the cannon's ability to launch objects with different masses. The instructor used tennis balls and filled them with lead, rocks, and styrofoam. The fourth tennis ball had nothing in it. The instructor fired each tennis ball with the same speed and measured the kinetic energy of each over a period of one second. Determine which tennis ball had rocks in it and explain.

• Green represents rocks because it is not as dense as lead and would likely have less mass than lead.

• Green represents rocks because the rocks would occupy less volume than lead but more than styrofoam.

• Purple represents rocks because it traveled faster than all the other objects since it is less dense.

• Purple represents rocks because it has more mass than all the other objects.

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