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With what speed should a body be thrown ...

With what speed should a body be thrown upwards so that the distances traversed in 5th second and 6th second are equal?

A

`58.4 m//s`

B

`49 m//s`

C

`sqrt(98) m//s`

D

`98m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
It is only possible when `5^(th)` sec is the last second for its ascending motion and `6^(th)` sec is first second of its dessending motion which is clear from figure.
`therefore 0=u-gt`
so `u=gt=9.8xx5=47 m//sec`
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ALLEN-MOTION IN A PALNE-EXERCISE-2
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