How would the kinetic energy of a 12,000-kg train compare with the kinetic energy of a 900-kg compact car of both were traveling at the same speed?

Answer 1

the K.E. is proportional to the mass

the mass of the train is about 13 times the mass of the car
... so it has about 13 times the K.E.

Answer 2

is this homework help or not

Answer 3

I am rlly not good at this im still confused!