When you know the amount of energy that was required to move a particle you can then calculate the power that was used. Power is an integral of energy in respect to time. Refer to equation 1.
(Eq 1) $P=F·V=\frac{dU}{dt}$
F = force
V = Velocity
P = Power
dU = Change in Energy
dt = Change in Time
Equation 1 represents the power input for a particle that has a linear projection. To calculate the power of a particle that has a rotational projection equation 2 would be used.
(Eq 2) $P=Tϖ$
T = Torque
ϖ = angular velocity
The units that represent power can be seen in equation 3.
(Eq 3) $1W=1\frac{J}{S}=1\frac{N·m}{s},~or~1hp = 550\frac{ft·lb}{s}$
Finally, due to energy losses from friction or drag, the power that is put in will be more then the output power. To calculate the efficiency equation 4 would be used.
(Eq 4) $ε=\frac{energy~output}{energy~input}$