Test Academy | A point P lies on the axis of a ring of mass M and radius a, at a distance a from its centre C. A small particle starts from P and reaches C under gravitational attraction only. Its speed at C will be √(2GM/a), √((2GM/a)(1-1/√2)), √((2GM/a)(√2-1)), Zero

Question

A point P lies on the axis of a ring of mass M and radius a, at a distance a from its centre C. A small particle starts from P and reaches C under gravitational attraction only. Its speed at C will be

Options :

√(2GM/a)
√((2GM/a)(1-1/√2))
√((2GM/a)(√2-1))
Zero

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