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The maximum height is reached in 5s by a...

The maximum height is reached in `5s` by a stone thrown vertically upwards and moving under the equation `10s=10ut-49t^(2)`, where `s` is in metre and `t` is in second. The value of `u` is: a)`4.9`m/sec b)`49`m/sec c)`98`m/sec d)None of these

A

`4.9m//sec`

B

`49m//sec`

C

`98m//sec`

D

None of these

Text Solution

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The correct Answer is:
B
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