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Assertion : When a girl sitting on a swi...

Assertion `:` When a girl sitting on a swing stands up, the periodic time of the swing will increase.
Reason `:` In standing position of the girl, the length of swing will increase.

A

both, Assertion and Reason are true and Reason is the correct explanation of the Assertion.

B

both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

Assertion is true but the Reason is false.

D

both,Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
d
Here, both assertioni and reason are false.
When a girl stands upono a swing, the position of centre of mass of girl is raised. Due to which the effective length of pendulum decreases, hence the time period of swing decreases because `Tprop sqrt(l).`
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