Kinematics Question 216
Question: A body freely falling from the rest has a velocity v after it falls through a height h. The distance it has to fall down for it’s velocity to become double, it’s [BHU 1999]
Options:
A) $ 2h $
B) $ 4h $
C) $ 6h $
D) $ 8h $
Show Answer
Answer:
Correct Answer: B
Solution:
Let at point A initial velocity of body is equal to zero for path AB : $ v^{2}=0+2gh $ -(i) for path AC : $ {{(2v)}^{2}}=0+2gx $
$ 4v^{2}=2gx $ -(ii) Solving (i) and (ii) $ x=4h $
BETA
