NEWTONS THIRD LAW

State Newton's Third Law.

When two objects interact, they exert forces on each other that are equal in magnitude and opposite in direction.

What is the 'normal contact force'?

The reaction force exerted by an object back onto the person or object pushing it.

If I push a box with 50N, what force does the box exert on me?

50N in the opposite direction.

Why does a smaller object move more than a larger object when pushed with the same force?

Because acceleration is force divided by mass (a = F/m); a smaller mass results in a higher acceleration.

Which law explains why an object's mass determines its acceleration?

Newton's Second Law (F = ma).