How are work and power related?

2 Answers
Mar 4, 2018

Work is the energy needed to apply a force to move an object a particular distance, where force is parallel to the displacement. Power is the rate at which that work is done.


Some possible units for each
Work #= F*d= N*m= J= (kgm^2)/s^2#
Power #= F*d/t= F*v= (N*m)/s= W= J/s= (kgm^2)/s^3#

Mar 13, 2018

As an example, a racing car and a family sedan might have the same mass. To get both moving at a speed of 30 m/s requires the same amount of work. However, since the racing car has more power, it can reach that speed in a shorter amount of time,