A stone is dropped from the top of a 20m high tower. 1sec later another stone is thrown downwards from the top. Both stones reach the ground simultaneously. If g is 10m/s2, the initial velocity of the second stone is
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A stone is dropped from the top of a 20m high tower. 1sec later another stone is thrown downwards from the top. Both stones reach the ground simultaneously. If g is 10m/s2, the initial velocity of the second stone is 15 m/s.
