Question

The length of a simple pendulum is 0.342m. The time of first maximum (or minimum) on the time scale is 3.16s. The time of the maximum (or minimum) after 10 periods is 14.86s. How do you calculate the average period of oscillations (i.e., the average of 10 periods)?

Why don't we measure the mass of the brass cylinder attached to the pendulum?

Answer 1

Average time period of oscillations.

T_avg = Total time/number of oscillations

= 14.86/10

= 1.486 s

Write the expression for the time period of the pandulum.

T= 2π√(L/g)

There is no term of mass in the expression of time period so that we cannot measure the mass of the brass cylinder attached to the pendulum.

The period of the pandulum is depends on the length of the rod or cylinder and it does not depends on the mass.

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