Kinematics Question 220
Question: Time taken by an object falling from rest to cover the height of $ h _{1} $ and $ h _{2} $ it’s respectively $ t _{1} $ and $ t _{2} $ then the ratio of $ t _{1} $ to $ t _{2} $ it’s [RPMT 1999; RPET 2002]
Options:
A) $ h _{1}\ :\ h _{2} $
B) $ \sqrt{h _{1}}\ :\ \sqrt{h _{2}} $
C) $ h _{1}\ :\ 2h _{2} $
D) 2h1 : h2
Show Answer
Answer:
Correct Answer: B
Solution:
$ t=\sqrt{\frac{2h}{g}}\Rightarrow \frac{t _{1}}{t _{2}}=\sqrt{\frac{h _{1}}{h _{2}}} $
