Two boats both having a mass of 150 kg including people in it are at rest. A sack of mass 50 kg makes the first boat having total mass of 200 kg. It is thrown to the second boat with a velocity whose horizontal component relative to water is 2mps. Calculate the distance (in m) between the boats 8.5 s. after the throw if the sack spent 0.5secs in air. Neglect the resistance of air and water .
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