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प्रश्न
Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.
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उत्तर
The diagram shows a freely oscillating pendulum.
In position A, it has max. P.E. and zero K.E.
In position B, it has zero P.E. and max. K.E.
In position C, it has a max. P.E. and zero K. E.
Thus, the experiment clearly proves that the sum of the total energy is conserved, but it can change its form.
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