A book is at rest on a table. Check all the forces that act on it.

A small child is pulling a wagon to the left, at a constant speed. Check all the forces that are acting on the wagon.

The football is flying upward and to the right. Check all the forces that are acting on it.

The hockey puck is sliding across perfectly smooth ice, at a constant speed. Check all the forces that are acting on it.

The boy is pulling and the girl is pushing. The wagon is accelerating to the right. Click all the forces that act on the wagon.

Mickey is climbing a rope. What forces are acting on him?

A heavier object will fall to earth faster than a light object (if we ignore air resistance)