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 $(g = 9.8 m / s^{2})$

24.5 m/s

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49.0 m/s

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73.5 m/s

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98.0 m/s

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Solution

The correct option is B 49.0 m/s
The given condition is possible only when body is at its highest position after 5 seconds.

It means time of ascent = 5 secs.

and time of light $T = \frac{2 u}{g} = 10 \Rightarrow u = 50 m / s .$

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