A Pirate Demands That His 75 Kg Prisoner "Walk the Plank

Multiple Choice

A pirate demands that his 75 kg prisoner "walk the plank". The prisoner walks out on an 8.0 m long, 50 kg horizontal board that juts out from the side of the pirate ship. If he walks out and stands 7.5 m from the place where the board is connected to the ship's side, what is the net torque applied to the board?

A) 5500 N·m
B) 7500 N·m
C) 0 N·m
D) 2000 N·m
E) Cannot determine