The ratio of the acceleration for a solid sphere (mass ‘ m ' and radius R ) rolling down an incline of angle…
Solution

Case - (II)
\(a^{\prime}=\frac{g \sin \theta}{1+\frac{K^2}{R^2}} \quad\left(\text { here } \frac{K^2}{R^2}=\frac{2}{5}\right)\)

\(\begin{aligned} & \therefore \frac{a}{a}=\left(1+\frac{K^2}{R^2}\right) g \sin \theta \\ & =\frac{1}{1+\frac{2}{5}}=\frac{1}{\frac{7}{5}}=\frac{5}{7}\end{aligned}\)
Asked in: MHT CET Full Test 1