Question

An open water wagon of mass 5×103 kg starts with initial velocity 1.2 m/s without friction on a railway track. rain drops fall vertically downwards into the wagon. the velocity of the wagon after it has collected 103 kg of water will be

Answer 1

since ground is friction less so there is no deacceleration
and the velocity is uniform

so velocity will remain the same that is 1.2m/s