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A particle is moving in a circle of radi...

A particle is moving in a circle of radius `r` with speed `v` as shown in the figure. The magnitude of change in velocity in moving from `P` to `Q` is

A

`2 v cos 40^(@)`

B

`2 v sin 40^(@)`

C

`2 v cos 20^(@)`

D

`2 v sin 20^(@)`

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The correct Answer is:
D
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