Vocab Force and Motion

Front

What is a wheel and axle?

Back

A simple machine that consists of a wheel attached to a rod (axle) that allows it to turn. It helps move things easily.

Front

What is an inclined plane?

Back

A flat surface that is tilted at an angle, like a ramp, which helps move objects up or down.

Front

What is a balanced force?

Back

When two or more forces acting on an object are equal in size and opposite in direction, causing no change in motion.

Front

What is an unbalanced force?

Back

When two or more forces acting on an object are not equal, causing the object to move in the direction of the greater force.

Front

What is motion?

Back

The change in position of an object over time.

Front

What is gravity?

Back

A force that pulls objects toward each other, like the Earth pulling us down.

Front

What is friction?

Back

A force that opposes motion between two surfaces that are in contact.

Front

What is a lever?

Back

A simple machine that consists of a bar that pivots on a point called a fulcrum, used to lift or move loads.

Front

What is a pulley?

Back

A simple machine that uses a wheel and a rope to lift heavy objects.

Front

What is a screw?

Back

A simple machine that is an inclined plane wrapped around a cylinder, used to hold things together or lift objects.