Q13 of 48 Page 38

Which of the diagrams shown in Fig. 6.7 represents variation of total mechanical energy of a pendulum oscillating in air as function of time?

When a pendulum oscillates in air its total mechanical energy

decreases continuously in overcoming resistance due to air.


We know that, total mechanical energy of pendulum decreases


exponentially with time


∴ option (c) is correct representation


of it.

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