Big Idea 13: Force and Motion

Which of the following is an example of a force?

• gravity

• chemical change

• a proton

• light

The more mass an object has ...

• less work the object can do

• more work the object can do

• less effect a force will have on the object's motion

• more effect a force will have on the objects motion

A ball has two forces acting on it. One force pushes it to the left, and a larger force pushes it to the right. If the ball moves to the right, which term BEST describes the forces acting on the ball?

• friction

• magnetic forces

• balanced forces

• unbalanced forces

What will MOST LIKELY happen if you increase the force you apply to an object?

• The object's motion will change more

• The object's motion will change less

• The force of gravity acting on the object will increase

• The force of gravity acting on the object will decrease

What are balanced forces?

• forces that do not change an object's motion

• forces that change an object's motion

• forces like gravity that are exerted by Earth

• forces that act in the same directions

Which is true of gravity?

• Gravity acts only through air, not through water or land

• Gravity does not act on airplanes flying in the sky

• Gravity always acts towards the center of the Earth

• Gravity does not act on objects falling through space

Which forces can affect an object's motion without touching the object?

• friction and gravity

• gravity and magnetic force

• friction and magnetic force

• gravity, friction and magnetic force

Which describes how forces affect a soccer ball?

• forces cause it to change color and size

• forces cause it to change speed and direction

• forces cause it to change mass and position

• forces causes to change location and weight

If you held the object in the picture near paper clips containing iron, what would be the result?

• the paper clips would be repelled

• the paper clips would be attracted

• the paper clips would not be affected

• the paper clips would be repelled by one pole and attracted by the other pole

Eli pushes a box with 1N of force, and Judy pushes with 2N in the opposite direction. Which describes what happens to the box?

• It does not move

• It moves toward Eli

• It moves toward Judy

• It moves toward Eli and then toward Judy