Suppose you are driving your car down the highway and speeding up. Which of the following are true?
A) The car's momentum is constant but not its kinetic energy.
B) The car's kinetic energy is constant but not its momentum.
C) Both the car's kinetic energy and momentum are constant.
D) Neither the car's kinetic energy nor momentum are constant.

Question

Quizplus · Accepted Answer

When a car is speeding up, both its velocity and momentum are increasing. Since kinetic energy is directly proportional to the square of the velocity, it increases as well. Therefore, neither the car's kinetic energy nor momentum remains constant.

Suppose You Are Driving Your Car Down the Highway and Speeding