A girl pulls a wagon along a level path for a distance of 44 m. The handle of the wagon makes an angle of 22º above horizontal. If she pulls on the handle with a force of 87 N, how much work is done?

A55-kg pilot flies a jet trainer in a half vertical loop of 1200-m radius so that the speed of the trainer decreases at a constant rate. knowing that the plane has a speed of 550 km/h at point a, and the pilot experiences weightlessness at point c (i.e., the normal force from the seat bottom is zero), determine (a) the deceleration of the plane, (b) the force exerted on her by the seat of the trainer when the trainer is at point b.