Interacting Objects

Example 20

Two boxes–one large and heavy, the other small and light–rest on a smooth, level floor. You push with a force on either the small box or the large box. Is the contact force between the two boxes (a) the same in either case, (b) when you push on the large box, or (c) larger when you push on the small box?

Example 21

A box of mass rests on a smooth, horizontal floor next to a box of mass . If you push on box 1 with a horizontal force of magnitude F = 20.0 N, (a) what is the acceleration of the boxes? (b) What is the force of contact between the boxes?

What happens if the relative position of the boxes is reversed? (a) What is the acceleration of the boxes? (b) What is the force of contact between the boxes? (c) What is the total force acting on box 2?

Ropes and Pulleys

Atwood Lab