Question

A 3m beam of negligible weight is balancing in equilibrium with a fulcrum placed 1m from its left end. If a force of 50N is applied on it's right end, how much force would need to be applied to the left end?
100N
25N
200N
50N

Answer 1

the right end is 2 meters from the fulcrum
50 * 2 = w * 1
w = 100