5. a 1-kg car and a 2-kg car are both released from the top of the same hill and roll down a frictionless track. at the bottom of the hill, which car will have the greater
speed? which car will have the greater kinetic energy?
o a the 1-kg car will have greater speed, and the 2-kg car will have greater kinetic energy
ob. the 2 kg car car will have greater speed, and the 7-kg car will have greater kinetic energy
oc. the cars will have equal speeds and equal kinetic energies.
od. the cars will have equal speeds and the 2 kg car will have greater kinetic energy