A typical meteor that hits the earth's upper atmosphere has

Last updated: 7/10/2022

A typical meteor that hits the earth's upper atmosphere has a mass of only 2.5 g, about the same as a penny, but it is moving at an impressive 40.0 km/s. As the meteor slows, the resulting thermal energy makes a glowing streak across the sky, a shooting star. The small mass packs a surprising punch. At what speed would a 900 kg compact car need to move to have the same kinetic energy? Assume all quantities are given to two significant figures. Give your answer in m/s.