An object of mass m, initially at rest under the action of a constant force F attains a velocity v in time t. Then, the average power supplied to mass is

Explanation

`W = F xx S = F = 1/2 F xx F/m t^2 = (F^2t^2)/(2m)`
Power `P = vecF cdot vecv = F(u + at) = F(0 + at) = Fat = F xx F/m t = (F^2)/(2m) t`.