3/39 The exercise machine is designed with a light- weight cart which is mounted on small rollers so that it is free to move along the inclined ramp. Two cables are attached to the cart-one for each hand. If the hands are together so that the cables are parallel, determine the force P which each hand must exert on its cable in order to maintain an equilibrium position. The mass of the per- son is 70 kg, the ramp angle 8 is 15°, and the angle ß is 18°. In addition, calculate the force R which the ramp exerts on the cart. 3 O