Problem: A man has to install an instrument on top of the mast of his sailboat. He uses a bosun's chair to hoist himself up. One end of a rope is tied to the bosun's chair and he pulls on the free end of the rope that goes over a frictionless pulley on top of the mast. The mass of the man and chair is 72.0 kg and he pulls on the rope with a force of 375 N.
Part A: With what acceleration does the man move up?
Please show all work and steps to find with what acceleration the man moves up.