6.8A PE + KE

An airplane is demonstrating a conversation of kinetic and potential energy when - 

• It goes to a higher altitude
• It moves downward to make a landing
• The wheels spin as it moves on the ground 

A motorcycle, a car and a bicycle, and a truck are moving at the same speed.  Which one has the least kinetic energy?

• motorcycle
• car
• bicycle
• truck

An apple hanging from the branch of a tree falls down.  How does its energy change as it falls?

• The kinetic energy of the apple converts to potential energy.
• The potential energy of the apple coverts to kinetic energy.
• The kinetic energy of the apple remains constant.
• The potential energy of the apple remains constant.

Which of the following has the greatest potential energy?

• A
• B
• C
• D

At which point will the skater have the least potential energy?

• Point A
• Point B
• Point C
• Point A and C

Harry used the energy stored up in his muscles to cycle up a hill.  What happened to this energy when he reached the top?

• The energy stored in Harry's muscles was destroyed when he reached the top of the hill.
• The energy used by Harry returned to his muscles when he reached the top of the hill.
• Kinetic energy converted to potential energy when Harry reached the top of the hill
• Potential energy converted to kinetic energy when Harry reached the top of the hill.

Which point has the most kinetic energy?

• D
• E
• C
• F

At which point is potential energy greatest?

• W
• X
• Y
• Z

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

At which point is kinetic energy greatest? 

• W
• X
• Y
• Z