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

A particle is moving in a circle of radius `r` centred at `O` with constant speed `v`. What is the change in velocity in moving from `A "to" B (/_ AOB = 40^@)` ?

A

`2v cos 40^(@)`

B

`2v sin 40^(@)`

C

`2v cos 20^(@)`

D

`2 v sin 20^(@)`

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The correct Answer is:

D

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