A Uniform Solid Sphere Rolls Down an Incline of Height

Multiple Choice

A uniform solid sphere rolls down an incline of height 3 m after starting from rest.In order to calculate its speed at the bottom of the incline,one needs to know:

A) the mass of the sphere.
B) the radius of the sphere.
C) the mass and the radius of the sphere.
D) no more than is given in the problem.