A cyclist increases his kinetic energy from 11 00 J to 5 200 J in 12 s. How can I calculate his power output during this time? Physics Work and Energy Power 1 Answer Alexander L. Apr 9, 2015 Power is the rate of change of output energy. #P=dE/dt# or #P=(DeltaE)/(Deltat)# Having said that, the change in energy #DeltaE= E_f - E_i=5200J-1100J# and your time interval #Deltat=12s#. Voila! Answer link Related questions What is power? How are work and power related? How are force and power related? How does power affect work? How does power differ from energy? How does power change with voltage? How does power relate to torque? How does work relate to conservation of energy? How does work relate to gravitational potential energy? What is horsepower? See all questions in Power Impact of this question 4149 views around the world You can reuse this answer Creative Commons License