Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other. On Earth, it pulls everything toward the center of the planet.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces rub against each other.

Front

What is a contact force?

Back

A contact force is a force that occurs when two objects are physically touching each other.

Front

What is a non-contact force?

Back

A non-contact force is a force that acts on an object without physical contact, such as gravity or magnetism.

Front

What happens to a ball when it rolls on the ground?

Back

The ball slows down due to friction between the ball and the ground.

Front

What force causes an orange to fall from a tree?

Back

The force of gravity causes the orange to fall to the ground.

Front

What is an example of a contact force?

Back

A baseball bat hitting a baseball is an example of a contact force.

Front

What is an example of a non-contact force?

Back

Static electricity is an example of a non-contact force.

Front

How does gravity affect water in a waterfall?

Back

Gravity pulls the water downward, causing it to flow over the sloping ground.

Front

What force acts against the motion of a rolling ball?

Back

Friction acts against the motion of a rolling ball, slowing it down.