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

The ratio of the acceleration for a solid sphere (mass m' and radius R) rolling down an incline of angle θ' without slipping and slipping down the incline without rolling is:
  1. 5:7
  2. 2:3
  3. 2:5
  4. 7:5

Solution

\(a=g \sin \theta\)

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

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