A3 m long plank with a weight of 130 n is placed on a dock with 1 m of its length extended over the water. the plank is uniform in density so that the center of gravity of the plank is located at the center of the plank. the boy with the weight of 180 in the standings plank and moving out slowly from the edge of the dock.
how far from the pivot point at the edge of the dock is the center of the plank?
what is the torque exerted by the weight of the plank about the pivot point at the edge of the dock? (treat all the weight as acting through the center of gravity of the plank).
how far from the edge of the dock can the boy move until the plank is just on the verge of tipping? round to the nearest hundredths place.