Q.

Identify correct statement among the following

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a

The greater the mass of a pendulum bob, the shorter is its frequency of oscillation

b

A simple pendulum with a bob of mass M swings with an angular amplitude of 40o. When its angular amplitude is 20o, the tension in the string is less than Mgcos20o.

c

As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also decreases

d

The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum

answer is C.

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Detailed Solution

Tcosθ=mg T=mgcos20>mgcos20°timeperiod T=2πlg If l increases T increases ω=2πT decreases, velocity v=rωdecreases
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Identify correct statement among the following