Question
A solid sphere, disc and solid cylinder all of the same mass and made of the same material are allowed to roll down (from rest) on the inclined plane, then ....
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Answer
For solid sphere, $\frac{K^{2}}{R^{2}}=\frac{2}{5}$
For disc and solid cylinder, $\frac{K^{2}}{R^{2}}=\frac{1}{2}$
As $\frac{K^{2}}{R^{2}}$ for solid sphere is smallest, it takes minimum time to reach the bottom of the incline, disc and cylinder reach together later.
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