Will give ! there are many natural processes that shape the earth's surface. these processes can act as constructive forces, destructive forces, or both. in general, natural processes act as constructive forces a) only at high elevations. b) only at sea level. c) when they wear down landforms. d) when they build up landforms.

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.