In the course of a short race car does 50,000 joules of work what is the power of the car during the race?

         Power  =  (work done) / (time to do the work)

                      =  (50,000 joules) / (7 seconds)

                     =  (50,000 / 7)  joules/sec

                     =      7,143 watts       (rounded)

               (about  9.6 Horsepower . . . . . not that much)