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

Multiple Choice

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

A) 5500 Nm
B) 7500Nm
C) 0 Nm
D) 2000 Nm
E) Cannot determine