A roundish object is rolling along the ground with 13.1 J of rotational KE. If its angular speed is 8.33 rad/s, what is its moment of inertia?

Answer 1

Hi Tamia, great question! The moment of inertia signifies an object's resistance to angular acceleration, just as mass signifies an objects resistance to linear acceleration. The formula for rotational kinetic energy is KE = 1/2 *(moment of inertia) (rotational velocity)^2. Thus, all you need to do here is plug in the numbers and solve for the moment of inertia. I hope that helps!