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Question
The potential energy of a simple pendulum in its resting position is 10 J and its mean kinetic energy is 5 J. Its total energy at any instant will be
The potential energy of a simple pendulum in its resting position is 10 J and its mean kinetic energy is 5 J. Its total energy at any instant will be
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Solution
The correct option is A 10 J
The total energy of the system remains constant. Since it is given that P.E at rest is 10J, the total energy must be 10J as K.E at rest is 0. The mean K.E is useless data. Hence option B is correct.
The total energy of the system remains constant. Since it is given that P.E at rest is 10J, the total energy must be 10J as K.E at rest is 0. The mean K.E is useless data. Hence option B is correct.
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