Question

the kinetic energy of a moving object varies directly with the square of its velocity. if a car is moving at 90 mph has kinetic energy 100 units, how many units of kinetic energy does the same car have at 10 mph?

Answer 1

KE = k*v^2

k = KE/v^2 = 100/810

KE | v = 10 = 100/810 * 100 = 10000/810 units

Answer 2

so its 810?

Answer 3

or 10000/810?

Answer 4

10000/810

Answer 5

great thank you so much