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From a certain tower of unknown height i...

From a certain tower of unknown height it is found that the maximum range at a certain pfojection velocity velocity is obtained for a projection angle of `30^(@)` and this range is `10sqrt3 m`. The projection velocity must be

A

`10 m//s`

B

`10 sqrt3 m//s`

C

`(10)/(sqrt3) m//s`

D

`5 m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`tan theta = (u^(2))/(Rg) rArr u = sqrt(Rg tan theta) = 10 m//s`
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