1. Two builders carry a sheet of drywall up a ramp. Assume that W = 1.70 m, L = 3.20 m, = 18.0°, and that the lead builder carries a weight of 137.0 N (30.8 lb). What is the weight carried by the builder at the rear ? I know torque and all forces add up to zero, as the drywall is not rotating, but don't I need to know the mass of the drywall?? 2. A rotating uniform cylindrical platform of mass 284 kg and radius 5.45 m slows down from 3.81 revolutions per second to rest in 18.2 s when the driving motor is disconnected. Calculate the power output of the motor required to maintain a steady speed of 3.81 revolutions per second. I tried Ke/time, but that didn't work... so out of ideas.