12 PHYSICs Activity 2 Second’s pendulum

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Second’s pendulum

Aim : To determine the length of second’s pendulum

App: metal sphere (bob) , inextensible string , retort stand, meter scale , stop watch, vernier calliper.

Formula : 


Observation: Radius of the bob= 0.9cm , 

Period of second’s pendulum Ts= 2 sec.

Observations for period oscillation T= period

Length of second’s pendulum = 
Result : length of second’s pendulum= L s =103.24 cm









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