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

The velocity vec(v) of a particle of mass 'm' acted upon by a constant

1.	The velocity vec(v) of a particle of mass 'm' acted upon by a constant force is given by vec(v)(t)=A[cos(kt)bar(i)-sin(kt)bar(j)]. Then the angle between the force and the velocity of the particle is (Here A and k are constants)
Answer» `90^(@)` `0^(@)` `180^(@)` `45^(@)` ANSWER :A