Questions
Mass of bob of a simple pendulum is 10 gm. It makes 10 oscillations in 15 seconds passes the mean position with a speed 4 cm/sec, work done by the tension in the suspension thread in oscillation is :
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a
5.6 J
b
6.8 erg
c
12.4 erg
d
zero
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Correct option is D
The displacement in a pendulum is always perpendicular to the tension in the string .F.d = 0 Thus, work done is equal to zeroSimilar Questions
When the bob of a simple pendulum swings, the work done by tension in the string is:
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