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  4. An open carriage in a goods train is moving with a uniform velocity of 10 ms -1. If the rain adds water with zero velocity at the rate of 5 kgs -1, then the additional force applied by the engine to maintain the same velocity of the train is

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Q. An open carriage in a goods train is moving with a uniform velocity of $10 \,ms ^{-1}$. If the rain adds water with zero velocity at the rate of $5 \,kgs ^{-1}$, then the additional force applied by the engine to maintain the same velocity of the train is

Laws of Motion

Solution:

$F=v \frac{d m}{d t}=10 \times 5 \,N =50\, N$