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The velocity vecv of a particle of mass ...

The velocity `vecv` of a particle of mass 'm' acted upon by a constant force is given by `vecv (t) = A[cos (kt) bari - sin (kt) barj]` . Then the angle between the force and the velocity of the particle is (Here A and k are constants)

A

`90^(@)`

B

`0^(@)`

C

`180^(@)`

D

`45^(@)`

Text Solution

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The correct Answer is:
A
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