Forces Review

The force of gravity acting on an object is the object's ______.

• Mass
• Matter
• Weight 
• Terminal velocity 

When you throw a ball up into the air, what makes it fall toward the ground?

• its weight

• the temperature

• air movement

• gravity

A pencil on Stacey’s desk rolls from one end to the other and falls. What is the effect of gravity on the falling pencil?

• it will pull the pencil back onto the desk

• it will cause the pencil to float

• it will have no effect

• it will cause the pencil to fall to the ground

Why do your feet stay on the ground instead of floating?

• friction

• gravity

• inertia

• pushes and pulls

David placed a car at the top of a ramp. Then he let go. Which picture most likely shows the final position of the car after it had stopped?

• 
• 
• 
• 

Where would you have to travel to reduce your weight but not lose any mass?

• The moon
• The Sun
• Jupiter
• Saturn

A person weighs _____ on the Earth than they do on the Moon. 

• less
• more
• the same

When the person pulls the swing back, what type of energy is being used?

• Light

• Sound

• Mechanical

• Heat

The boy's brother comes up to the other end of the wagon and pushes it forward.

What happens to the motion of the wagon?

• It will slow down.

• It will stop.

• It will speed up.

• It will move backwards.

The boy's brother comes up to the other end of the wagon and pulls it gently backward. What happens to the motion of the wagon?

• It will speed up.

• It will turn to the side.

• it will slow down.