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A particle moves in the xy plane under t...

A particle moves in the `xy` plane under the influence of a force such that its linear momentum is `vecP(t) = A [haticos(kt)-hatjsin(kt)]`, where `A` and `k` are constants. The angle between the force and momentum is

A

The magnitude of the force is Ak

B

The angle between force and momentum is  `pi/2`

C

The angle between force and momentum is it `pi`

D

The angle between acceleration and velocity vectors is always `pi//2`

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The correct Answer is:
A, B, D
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