An object of radius R and moment of inertia I rolls down an incline of height H after starting from rest.Its total kinetic energy at the bottom of the incline:
A)is gR/I.
B)is I/gH.
C)is 0.5Ig/H.
D)cannot be found from the given information alone.

Question

Quizplus · Accepted Answer

The total kinetic energy at the bottom of the incline depends on both the rotational and translational motion of the object. The given information (radius R, moment of inertia I, and height H) is not sufficient to determine the total kinetic energy without knowing the mass of the object, the angle of the incline, or the acceleration due to gravity (g).

An Object of Radius R and Moment of Inertia I