Two small boats, both having a mass of `150 kg` including passengers in it, are at rest. A sack of mass `50 kg` inakes `1^(st )` boat having total mass of `200 kg`. It is thrown to the second boat with a velocity whose, horizontal component is `2 m / s` relative to water. Calculate the distance (in m) between the boats `4.5 s` after. the throw, if the sack spent `0.5s` in air. Neglect resistance of air and water.

Answer

6