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}}} $



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