A racing car has a mass of 1540 kg. What is its kinetic energy if it has a speed of 110 km/h? Assume that air resistance is negligible.

Answer 1

Kinetic Energy (KE)=(1/2)mv^2

First convert km/hr to m/s
(110km/hr)*(1000m/1km)*(1hr/3600s) =
30.6 m/s

Plug everything into the formula

KE = (1/2)(1540kg)(30.6m/s) =
23527.78 Joules

Answer 2

Actually, forgot to square the velocity:
KE = (1/2)(1540kg)(30.6)^2 =
720997.2 Joules