scale

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. UNIT- (XI- - ) PRACTICAL FIRST UNIT- (XI- - ) PRACTICAL FIRST - - - - 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 M - - is calculated and its average is found. ¾ Using the given formula the spring constant of the given spring is calculated. OBSERVATIONS Sl. No. Mass M × − kg Time taken for oscillations (t) (s) Period of oscillation t = (s) T ( s ) M M - - kg s Trial Trial Mean Mean = . . . . . . kg s - CALCULATION Spring constant of the spring k = 4π M M   k = . . . . . . . . . . . . . . kg s - RESULT The spring constant of the given spring k is found to be = . . . . . . . . . . . . kg s - UNIT- (XI- - ) PRACTICAL FIRST UNIT- (XI- - ) PRACTICAL FIRST - - - - Practical