3.7 Newton's Third Law

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What unit do we measure force in?

Back

Newtons (N)

Front

If you push against a wall, what is the reaction force?

Back

The wall pushes back against you with equal force.

Front

When a small car collides with a big truck, what can we say about the forces they exert on each other?

Back

They exert the same size force on each other.

Front

What happens to the forces when two objects interact?

Back

The forces are equal in size and opposite in direction.

Front

If a person jumps off a small boat, what happens to the boat?

Back

The boat moves in the opposite direction due to the reaction force.

Front

What is an example of Newton's Third Law in everyday life?

Back

Walking: Your foot pushes back on the ground, and the ground pushes your foot forward.

Front

What is the relationship between mass and force in Newton's Third Law?

Back

Mass does not affect the size of the force; all forces are equal and opposite.

Front

What is the reaction force when you sit on a chair?

Back

The chair pushes up against you with an equal force.

Front

How does Newton's Third Law apply to swimming?

Back

When you push water backward, the water pushes you forward.