how slow would a 60,000 kg freight car have to roll to have the same momentum as an 80 kg person running 6.5 m/s

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Which bonds are found inside a water molecule

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe