Question

difference between simple pendulum and compound pendulum​

Answer 1

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Simple pendulum: A simple pendulum is a heavy point mass suspended from a rigid support by a massless string and inextensible string.

The frequency of simple pendulum depends upon length of a string and acceleration due to gravity.

Compound pendulum: The compound pendulum is a body which is able to oscillate about a horizontal axis through it.

The compound pendulum is a body which is able to oscillate about a horizontal axis through it. The frequency of compound pendulum depends upon radius of gyration, mass of pendulum and acceleration due to gravity.

Answer 2

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• A pendulum consists of an object suspended along an axis so that it is able to move back and forth freely. Depending on the shape of the pendulum, a pendulum could be classified as a simple pendulum or a compound pendulum (physical pendulum).

• In a simple pendulum the dimensions of the object in suspension is significantly smaller than the distance from the centre of gravity of the object to the axis of suspension. This allows us to treat the mass as though it were a single point.

• In a compound pendulum, the distance between the centre of gravity of the swinging body and the axis of suspension is comparable to the dimensions of the body.

• The main difference between simple pendulum and compound pendulum is that, in a simple pendulum, the distance between the centre of gravity of the suspended body and the axis of suspension is large compared to the dimensions of the suspended body whereas, in a compound pendulum, the dimensions of the suspended body are comparable to the distance between the body’s centre of gravity and the axis of suspension.