Laws Of Motion Question 219

Question: A train is moving with velocity 20 m/sec. on this dust is falling at the rate of 50 kg/minute. The extra force required to move this train with constant velocity will be [RPET 1999]

Options:

A) 16.66 N

B) 1000 N

C) 166.6 N

D) 1200 N

Show Answer

Answer:

Correct Answer: A

Solution:

$ F=u\ ( \frac{dm}{dt} )=20\times \frac{50}{60}=16.66N $



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