Question

A 40 kg boy sit 1.2m from the fulcrum of a see-saw. Where should the another boy of 30 kg sit on the other side in order tobalance it?

Answer 1

Answer:

distance=1.6 m

Explanation:

For equilibrium

torque on left side = torque on right side

r1 x F1 = r2 x F2

1.2 x 40 = r2 x 30

48 = r2 x 30

48/30 = r2

1.6 m = r2