Kinematics Question 219

Question: A body projected vertically upwards with a velocity $ u $ returns to the starting point in 4 seconds. If $ g=10 $ m/sec2, the value of $ u $ it’s [KCET 1999]

Options:

A) 5 m/sec

B) 10 m/sec

C) 15 m/sec

D) 20 m/sec

Show Answer

Answer:

Correct Answer: D

Solution:

Time of flight $ T=\frac{2u}{g}=4\ \sec \Rightarrow u=20\ m/s $



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