A. A retired physics instructor is riding bulls at the rodeo to earn money. He is thrown upward at a forty degree angle. Assuming no air friction, at what points will the magnitude of his acceleration equal "g"?
B. A car is moving along a horizontal straight road. Is it possible for the forces acting on the car to sum to zero. Explain?
C. Why is it that the force of gravity does no work on your body as you sit in your chair?