Question

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

Answer 1

Answer:

First we can find Force by differentiation of P wrt t and after that we can find angle by dot product.