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

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)