Laws Of Motion Question 303
Question: If the coefficient of friction between all surfaces is 0.5, then find the minimum force F to have equilibrium of system. (assume strings and pulleys are massless)
Options:
A) $ \frac{4000}{17}N $
B) $ \frac{1000}{17}N $
C) $ \frac{2000}{17}N $
D) $ \frac{500}{17}N $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ T=2f+500~~~~ $ ….(i)
$ 8T=5000-f $ -(ii)
$ f=\frac{1}{2}F $ -(iii)
From (i), (ii) and (iii) $ F=\frac{2000}{17}N $
