Q1. An 1100- car is held in place by a light cable on a very smooth (frictionless) ramp. The cable makes an angle of 31.0 above the surface of the ramp, and ramp itself rises at 25.0 above the horizontal. How hard does the surface of the ramp push on car?
Q2. A 110 kg mail bag hangs by a vertical rope 4.0 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. As the bag is moved to this position, how much work is completed by the worker?