A body is thrown vertically upward with velocity `u`. The distance traveled by it in the fifth and the sixth second are equal. The velocity `u` is given by

Options

A. 24.5 m/s
B. 49.0 m/s
C. 73.5 m/s
D. 98.0 m/s

Answer

B

Explanation

The given condition is possible only when body is at its highest position after 5 seconds
time of ascent = 5 sec
`Time of flight (T) `= (2u)/(g) = 10 sec`
`rArr u = (9.8 xx 10)/(2) = 49m//s`