Front

What is a lever?

Back

Stiff bar that moves freely on a fixed point

Front

Inclined plane

Back

Simple machine made up of a slanted surface

Front

What is friction?

Back

A force that slows or stops motion between two surfaces

Front

What is gravity?

Back

A force that pulls objects toward each other

Front

What is force?

Back

Pushes or pulls that cause objects to change their motion

Front

What is a wheel & axle?

Back

Two cylinders that turn on the same axis

Front

What is a screw?

Back

Inclined plane wrapped around a post

Front

Pulley

Back

A rope fitted around the rim of a fixed wheel

Front

What is a simple machine?

Back

An object that changes a force

Front

What is a wedge?

Back

Simple machine made up of two inclined planes