Discuss the below:
Q: A man with mass sits on a platform suspended from a movable pulley, as shown in the figure , and raises himself at constant speed by a rope passing over a fixed pulley. The platform and the pulleys have negligible mass. Assume that there are no friction losses
1. Find the force he must exert.
Take the free fall acceleration to be .
2. Find the increase in the energy of the system when he raises himself a distance . (Answer by calculating the increase in potential energy.)
Take the free fall acceleration to be
3. Find the increase in the energy of the system when he raises himself . (Answer by computing the product of the force on the rope and the length of the rope passing through his hands.) Take the free fall acceleration