scale

PROCEDURE ¾ A spring is firmly suspended vertically from a rigid clamp of a wooden stand at its upper end with a mass hanger attached to its lower end. A pointer fixed at the lower end of the spring moves over a vertical scale fixed. Practical ¾ A suitable load M (eg; g ) is added to the mass hanger and the reading on the scale at which the pointer comes to rest is noted. This is the equilibrium position.

¾ The mass in the hanger is pulled downward and released so that the spring oscillates vertically on either side of the equilibrium position. ¾ When the pointer crosses the equilibrium position a stop clock is started and the time taken for vertical oscillations is noted. Then the period of oscillation T is calculated. ¾ The experiment is repeated by adding masses in steps of g to the mass hanger and period of oscillation at each time is calculated.

¾ For the masses M and M ( with a difference of g ), their corresponding time periods are T and T . Then the value M