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MHT CET 2023 (13 May, Shift 1) · Rolling Motion

Rolling Motion question from MHT CET 2023 (13 May, Shift 1)

Q35MHT CET 2023 · 13 MAY · SHIFT 1Easy

Rolling Motion

The rotational kinetic energy and translational kinetic energy of a rolling body are same, the body is

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Answer: (d)

$\frac{K_{rot}}{K_{trans}} = \frac{k^2}{R^2}$ for rolling.
Equal energies need $k^2 = R^2$ , i.e. $I = mR^2$ .
This is true for a ring (disc and cylinder $\frac{1}{2}$ , sphere $\frac{2}{5}$ ).
So the answer is (d) ring.

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