The average power supplied to an object by some force agent over an interval t is defined as:

    Pavg  = W/t    where W is the work done by that force during the interval.

The average net power supplied to an object over some interval is the total work done by all forces divided by the time:

    Pnet = Wnet/t

The instantaneous power supplied to an object at any instant by an entity exerting a force on it shown to be the dot product of the force and velocity vectors, which can be computed as

    P = F * v * cos(q)        instantaneous power
where
     F is the magnitude of the force,
     v is themagnitude of  instantaneous velocity of the object at that time, and
    q is the angle between F and v.