1.A stuntman is being pulled along a rough road at a constant velocity by a cable attached to a moving truck. The cable is parallel to the ground. The mass of the stuntman is103kg, and the coefficient of kinetic friction between the road and him is0.738. Find the tension in the cable

2.The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=56900N. The lift force L generated by the rotating blade makes an angle of 21.0 with respect to the vertical. (a) What is the magnitude of the lift force? (b) Determine the magnitude of the air resistance R that opposes the motion.