A train is moving with velocity $20 m / s$ . On this, dust is falling at the rate of $50 k g / m i n$ . The extra force required to move this train with constant velocity will be (in $N$ )

16.66

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166.66

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1200

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Solution

The correct option is C $16.66$
Force required $F = \frac{d P}{d t}$
Extra force required will be due to the extra mass falling on train per second.
where rate of change in momentum $\frac{d P}{d t} = \frac{50 \times 20}{60}$ $k g m / s$
So, required force $F$ $= \frac{50 \times 20}{60} N$
$F = 16.66 N$

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A train is moving with velocity 20m/s. On this, dust is falling at the rate of 50kg/min. The extra force required to move this train with constant velocity will be (in N)

The correct option is C 16.66Force required F=dPdtExtra force required will be due to the extra mass falling on train per second.where rate of change in momentum dPdt=50×2060 kg m/sSo, required force F =50×2060NF=16.66N

A train is moving with velocity $20 m / s$ . On this, dust is falling at the rate of $50 k g / m i n$ . The extra force required to move this train with constant velocity will be (in $N$ )