Question

What is the type of energy possessed by a moving car?

• A. potential energy only
• B. kinetic energy of translation only
• C. kinetic energy of rotation only
• D. kinetic energy of translation and rotation

Answer 1

Answer:

D. kinetic energy of translation and rotation

moving car possesses both kinetic energy of translation and rotation. Kinetic energy is the energy possessed by a body due to its motion. The formula for kinetic energy is $KE = 1/2 mv ^ 2$ where m is the mass of the body and v is the velocity of the body. As the car has rotating wheels, it also possesses rotational kinetic energy ($1/2 I \omega ^ 2$) Where I = Moment of inertia, omega = angular velocity of the wheel