If the work required to speed a car from 10 km/h to 20 km/h is 5.0 x 10^3
J, what would be the work required to increase its speed from 20 km/h to 30 km/h
(30^2 - 20^2)/(20^2 - 10^2) = 5/3
so 5/3 * 5000 = ____ J
J, what would be the work required to increase its speed from 20 km/h to 30 km/h
so 5/3 * 5000 = ____ J