A point \( P(R \sqrt{3}, 0,0) \) lies on the axis of a ring of mass \( M \) and radius \( R \). ...
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0A point \( P(R \sqrt{3}, 0,0) \) lies on the axis of a ring of mass \( M \) and radius \( R \). The ring is located in
P \( y-z \) plane with its centre at origin \( O \). A small particle of mass \( m \) starts from \( P \) and reaches
W \( O \) under gravitational attraction only. Its speed at \( O \) will be
(a) \( \sqrt{\frac{G M}{R}} \)
(b) \( \sqrt{\frac{G m}{R}} \)
(c) \( \sqrt{\frac{G M}{2 R}} \)
(d) \( \sqrt{\frac{G m}{\sqrt{2} R}} \)
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