Assignment:
A man sitting in a cage is connected to a pulley system of three movable and one fixed pulley in the system shown in figure.
He pulls down on a rope as shown, to raise himself and the cage. The man and cage have a total weight of 639 nt. Ignore friction as negligible.
a. Find the force he exerts to move upward with constant velocity.
b. Find the force he exerts to move upward with acceleration of 1.8 m/sec^2.
