A solid sphere of mass \( M \) and radius \( R \) is initially at rest. Solid sphere is graduall...

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A solid sphere of mass \( M \) and radius \( R \) is initially at rest. Solid sphere is gradually lowered onto a truck moving with constant velocity \( v_{0} \)
What is the final speed of the spheres centre of mass in ground frame when eventually pure rolling sets in
(1) \( \frac{5}{7} v_{0} \)
(2) \( \frac{2}{7} v_{0} \)
(3) \( \frac{7}{5} v_{0} \)
(4) \( \frac{7}{2} v_{0} \)
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