Question

a 40 kg boy sits 1.2 m away from the fulcrum of a see-saw. Where should the other boy of 30 kg sit on the other side to balance it?

Answer 1

Explanation:

Let the distance from the fulcrum where the another boy sit be x. The moment of force on both side of the fulcrum must be same to the balance. Hence, Another boy sits 1.6 m from the fulcrum.