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A hollow sphere of mass m and radius R i...


A hollow sphere of mass m and radius R is placed on smooth gound. A particle of mass m is projected with velocity `v_(0)` and angle `theta` lowest point a inside the sphere as shown in diagram if particle strikes the sphere at a point which is on horizontal level of centre and at that moment particle is at highest point. The collision between particle and sphere is elastic. The value of `v_(0)` is

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