Question

precautions to take while performing experiment of compound pendulum

Answer 1

A simple pendulum is an arrangement, wherein an inelastic thin string of ideally no mass with a heavy point bob at one end and tied to a fixed horizontal rod, hanging freely and is free to make movement about mean point.

The precautions while measuring period of oscillations:

Record time for arround 20 oscillations. And record the time for a repeated number of 20 oscillations and find the average period of oscillations.

The length of the pendulum should take into account hook, sring length, and radius of the bob.

The sring should not be streched too much while measuring its length.

The amplitudes should be very small, or the angle of the amplitude should be very small.

Answer 2

Answer:

The compound Pendulum experiment determines the acceleration due to gravity (g) and the radius of gyration about an axis through the center of gravity.

The following precautions must be taken while performing the compound pendulum experiment.

Explanation:

• Make sure that the pendulum oscillates in a vertical plane and there is no rotational motion i.e., it just makes to-and-fro movement in the vertical axis, and it does not rotate.

• Ensure that the length of the pendulum is measured from the center of mass of the bob.

• The top support should be fixed i.e., the string should be clamped.

• The amplitude of oscillations should be small (approximately 4°-5°).

• Use a precise stopwatch and time should be noted as accurately as possible.

• There should be no significant air current present that can potentially alter the motion of the pendulum.

• Take multiple sets of observations and then average them out after removing outliers to get accurate results.

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