A wagon weighing 1000 kg is moving with a velocity 50 km/h on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is
Text Solution
Verified by ExpertsThe correct answer is:
C
Initially the wagon of mass 1000 kg is moving with velocity of 50 km/h
So, its momentum 
When a mass 250kg is dropped into it. New mass of the system 
Let v is the velocity of the system.
By the conservation of linear momentum: Initial momentum = Final momentum
⇒ ⇒ 
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