Laws Of Motion Question 239
Question: If in a stationary lift, a man is standing with a bucket full of water, having a hole at its bottom. The rate of flow of water through this hole is $ R _{0}. $ If the lift starts to move up and down with same acceleration and then that rates of flow of water are $ R _{u} $ and $ R _{d}, $ then [UPSEAT 2003]
Options:
A) $ R _{0}>R _{u}>R _{d} $
B) $ R _{u}>R _{0}>R _{d} $
C) $ R _{d}>R _{0}>R _{u} $
D) $ R _{u}>R _{d}>R _{0} $
Show Answer
Answer:
Correct Answer: B
Solution:
Rate of flow will be more when lift will move in upward direction with some acceleration because the net downward pull will be more and vice-versa. $ {F _{upward}}=m(g+a) $ and $ {F _{downward}}=m(g-a) $
