Question

Describe Physical and Spring Balance?

Answer 1

A Spring Balance is used to weigh objects as tension produced in the spring. The weight is attached at the end of the helical spring the extension of which indicates the weight of object on a calibrated scale.
Physical balance works on the principle of moments according to which in equilibrium, the anti-clockwise moment due to the weight of an object on left pan of the beam is equal to the clockwise moment due to the standard weights on the right pan of the beam.