Category 2 Review

Which apple has more potential energy?

• Tree 1
• Tree 2

Which apple will have more kinetic energy?

• Tree 1
• Tree 2

Describe the energy transformation.

• electrical to radiant 
• radiant to kinetic
• mechanical to potential to electrical 
• kinetic to mechanical to electrical 

What causes the ballon to move?

• an object in motion stays in motion
• action reaction
• law of force and acceleration
• air moves forward the balloon moves forward 

What chemical changes occur in the picture? What physical changes occur in the picture?

• stomach muscles breaking pieces of food is a chemical change
• teeth breaking up pieces of food is a physical change.
• only physical changes happen in the stomach
• only chemical changes happen in the mouth

Compare the amount of potential energy and kinetic energy at points X and Y.

• They have the same amount of kinetic energy
• Y has more potential energy than X
• It has more potential energy at X than at Y
• They have the same amount of potential energy

What type of motion would describe the car pictured below?

• speed
• velocity
• acceleration

A man applies a force of 100N to a 1^st rock for 60 seconds, but the rock does not move. He applies the same force to a 2^nd rock which moves a distance of 2 meters. What conclusion can be drawn about the amount of work being done?

• the man did an equal amount of work
• the man did no work on rock 2 
• the man did more work on rock 1
• Rock 1 the man did no work

What is the motion of the object from 0-2 seconds?

• the object is at rest
• the object moves at a constant speed
• the car is accelerating
• the car is decelerating 

What is the motion of the object from 2-3 seconds?

• the object is at rest
• the object moves at a constant speed
• the car is accelerating
• the car is decelerating