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?

Question

a) Mv22t

b) Mv2t

c) Mvt

D) Mv2t

Answer 1

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)