First slide

Angular momentum

Question

A particle performs uniform circular motion with an angular momentum L. If the frequency of the particle motion is doubled, the angular momentum becomes

Easy

A

2L
B

4L
C

$\frac{L}{2}$
D

$\frac{L}{4}$

Solution

Angular momentum, $L = I ω = I (2 π f)$
Frequency f is doubled. Hence, angular momentum will become 2L.

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