Question

A particle moves in the XY-plane under the influence of a force such that its linear momentum is p(t) = A[î cos (kt) – ĵ sin (kt)] where A and k are constant. The angle between the force and the momentum is?

Answer 1

I think we can use the fact\[\rm force = \dfrac{dp}{dt}\]

Answer 2

yh i think i got it! thanx! so F = -Aksin(kt)î -Aksin(kt) ĵ