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 $
