Forces and Motion

Front

What is a force?

Back

A force is a push or a pull that can change the motion of an object.

Front

What can a force change in an object's motion?

Back

A force can change an object's speed, direction, or shape.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What is air resistance?

Back

Air resistance is a type of friction that acts against objects moving through the air.

Front

Why do airplanes have sleek shapes?

Back

Airplanes have sleek shapes to reduce friction from air resistance.

Front

What happens to an object's motion when a force is applied?

Back

The object's motion can change in speed or direction.

Front

Which surface has the least friction: ice or sandpaper?

Back

Ice has less friction than sandpaper because it is smoother.

Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other, like the Earth pulling us down.

Front

How does a push affect an object?

Back

A push can make an object move away from the person or thing pushing it.

Front

How does a pull affect an object?

Back

A pull can make an object move closer to the person or thing pulling it.