Kinematics Question 179

Question: A body falls freely from rest. It covers as much distance in the last second of it’s motion as covered in the first three seconds. The body has fallen for a time of [MNR 1998]

Options:

A) $ 3s $

B) $ 5s $

C) $ 7s $

D) $ 9s $

Show Answer

Answer:

Correct Answer: B

Solution:

$ \frac{1}{2}g{{(3)}^{2}}=\frac{g}{2}(2n-1)\Rightarrow n=5\ s $



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