Question

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

Answer 1

Answer: it’s D.The cars will have equal speeds and the 2 kg car will have greater kinetic energy.

Explanation:Each car experiences the same gravitational acceleration of 9.81 m/s2, so each car will reach the bottom of the track with the same speed. The heavier car will have greater kinetic energy because the kinetic energy of an object is proportional to its mass.

Answer 2

The cars will have equal speeds and the 2 kg car will have greater kinetic energy.