Kinematics Question 192

Question: A stone thrown upward with a speed $ u $ from the top of the tower reaches the ground with a velocity $ 3u $ . The height of the tower it’s [EAMCET 1983; RPET 2003]

Options:

A) $ 3u^{2}/g $

B) $ 4u^{2}/g $

C) $ 6u^{2}/g $

D) $ 9u^{2}/g $

Show Answer

Answer:

Correct Answer: B

Solution:

$ v^{2}=u^{2}+2gh $
$ \Rightarrow {{(3u)}^{2}}={{(-u)}^{2}}+2gh\Rightarrow h=\frac{4u^{2}}{g} $



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