Question

A particle moves in the x - y plane under the
influence of a force such that its linear momentum
is ö(t) = [i cos(at) - j sin(at)]B, where a and B
are constants. The angle between the force and
the momentum is
(1) 0°
(2) 45°
(3) 60°
(4) 90°​

Answer 1

Answer:

90°

Explanation:

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