A car of mass accelerates from rest to a speed in time with negligible friction and air resistance. What is an expression for the average power delivered by the car's engine?


a) Mv22t

b) Mv2t

c) Mvt

D) Mv2t

1 answer

To raise something to a power please use ^ symbol
To divide please use / symbol

work done = kinetic energy gained = (1/2)mv^2

power = work done/time
= (1/2) m v^2 t
= m v^2 /(2t)