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A ball B of mass m is lying at rest on t...

A ball B of mass m is lying at rest on the top surface of a smooth horizontal table 5 m high. Another moovin ball A of same mass make an elastic colision with B slides off the table and strikes the floor at a horizonatal distance of 10 m from the table. Then select the correct alternatives (s). `[g=10m//s^(2)]`

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