Which of the following is the quantity that does not change while the bob of a simple pendulum oscillates?

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Total energy

Velocity

Both

None

answer is A.

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Detailed Solution

Simple pendulum's total energy is conserved.
A straightforward example of energy conservation is a swinging pendulum. It demonstrates the conversion of potential energy into kinetic energy and kinetic energy back into potential energy. The total energy of the bob in a basic pendulum is constant at all times. A simple pendulum's bob starts out in mean position B. The bob begins swinging when it is tugged to one side at A, then released. At the extreme positions A and C, all of the energy is in the form of potential energy, but at the middle position B, all of the energy is kinetic energy. The pendulum's energy is partially potential and partially kinetic in all other intermediate positions. But the simple pendulum's total energy is conserved.

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