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A particle is confined to rotate in a ci...

A particle is confined to rotate in a circular path decreasing linear speed, which of the following is correct?

A

`vecL` angular momentum) is conserved about the centre

B

Only direction of angular momentum `vecL` is conserved

C

It spirals towards the centre

D

Its acceleration is towards the centre

Text Solution

Verified by Experts

The correct Answer is:
B
`|vecL|=mvr`. Since v is changing (decreasing), L is not conserved in magnitude. Since it is given that a particle is confined to rotate in circular path, it cannot have spiral path. Since the particle has two accelerations and therefore the net acceleration is not towards the centre.
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