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 is given by (g = 9.8 m/s2

(1) 24.5 m/s

(2) 49.0 m/s

(3) 73.5 m/s

(4) 98.0 m/s

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Concept Questions :-

Uniformly accelerated motion

(2) The given condition is possible only when body is at its highest position after 5 seconds

It means time of ascent = 5 sec

and time of flight $T=\frac{2u}{g}=10$$u=50\text{\hspace{0.17em}}m/s$

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