(i) At a certain instant, a particle look like object is acted on by a force = (2.3 N) -(1.2 N) + (6.2 N) whereas the velocity of the object is = -(3.0 m/s) + (4.9 m/s). Determine the instantaneous rate at which the force does work on the object?
(ii) At some other time, the velocity comprises of only y component. When the force is unaffected, and the instantaneous power is -6.4 W, determine the velocity of the object just then? (Provide your answer devoid of a unit vector.)