Question

A wagon weighing 1000 kg is moving with
a velocity 50km/h on smooth horizontal
rails. A mass of 250 kg is dropped into it.
The velocity with which it moves now is
(a) 2.5 km/hour (b) 20 km/hour
(c) 40 km/hour (d) 50 km/hour​

Answer 1

Answer is (C) 40 Km/hour

For explanation, see attachment

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