Question

A uniform metre scale is kept in equilibrium when supported at the 60cm mark and a mass M is suspended from the 90cm mark. State with reason whether the weight of the scale is greater than, less than or equal to the weight of mass M.

Answer 1

Since the meter scale is uniform 

∴ Its mass per unit length is same and its wt. W acts at 50cm mark. 

∴ W × (60 – 50) = M(90 – 60)