A constant force 'F' is applied at the top of a ring as shown in figure. Mass of

Question

A constant force 'F' is applied at the top of a ring as shown in figure. Mass of the ring is 'M' and radius is 'R'. Angular momentum of particle about point of contact at time 't' is

Options:

A . Is constant

B . Increases linearly with time

C . Is Zero

D . Decreases linearly with time

Answer: Option B
:
B
Angular impulse = change in angular momentum
we have L =

τ

*t
or, L = F*(2R)*t
i.e.L increases linearly with time.

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