Laws Of Motion Question 190
Question: Gravels are dropped on a conveyor belt at the rate of 0.5 kg/sec. The extra force required in newtons to keep the belt moving at 2 m/sec is [EAMCET 1988]
Options:
A) 1
B) 2
C) 4
D) 0.5
Show Answer
Answer:
Correct Answer: A
Solution:
Opposing force $ F=u\ ( \frac{dm}{dt} )=2\times 0.5=1\ N $
$ ( \text{As,}\ F=u\frac{du}{dt} ) $ So same amount of force is required to keep the belt moving at 2 m/s
