Question

Which has a greater rotational inertia, acylinder about its axis or a sphere about a diameter if the two have the same mass and radius?

Answer 1

Answer:

Cylinder

Explanation:

M.O.I. of cylinder is (MR^2)/2

And M.O.I. of sphere is 2(MR^2)/5

Answer 2

For cylinder,

I = $\frac{1}{2}$ MR^2

For sphere

I = $\frac{2}{5}$ MR^2

Therefore it is greater for cylinder

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