Q28 of 40 Page 102

The length of a second’s pendulum on the surface of Earth is 1m. What will be the length of a second’s pendulum on the moon?

Time period of a second’s pendulum is,


, where T = time period


L = Length of the pendulum


g = acceleration due to gravity


∴


For moon,


------(1)


For earth,


------(2)


Dividing equation 1 by 2 we get,



∴


Therefore, the length of the second pendulum will be 170 cm


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