Forces on moving objects
For every force, there is an equal sized force acting in the opposite direction
When you sit on a chair, it pushes up on you as hard as you push down on it
The weight of a skydiver pulls down on a parachute. This is matched by the upwards tension in the parachute strings.
When a gun is fired, the bullet feels a forward force. The bullet exerts an equal sized backwards force on the gun, which recoils.
When a lift accelerates upwards, the force of the floor pushing upwards is greater than the weight…