Question

A 2000 kg car is moving with a velocity of 50 km/hr. What is its kinetic energy? If the car reduces its speed by half, by what factor is the kinetic energy changed?

bobpursley
ke= 1/2 M V^2

I will be happy to critique your thinking.
rosie
ke=1/2*2000kg*50
ke=50000
bobpursley
No. first, you have to have velocity in m/s. Convert km/hr.

Second, thequatioon says square velocity.