Kinematics Question 248

Question: A body is thrown vertically upwards with velocity u. The distance travelled by it in the fifth and the sixth seconds are equal. The velocity u it’s given by (g = 9.8 m/s2) [UPSEAT 2004]

Options:

A) 24.5 m/s

B) 49.0 m/s

C) 73.5 m/s

D) 98.0 m/s

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Answer:

Correct Answer: B

Solution:

The given condition it’s possible only when body is at it’s highest position after 5 seconds It means time of ascent = 5 sec and time of flight $ T=\frac{2u}{g}=10 $

therefore $ u=50\ m/s $



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