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A particle is projected at an angle of e...

A particle is projected at an angle of elevation `alpha` and after t second it appears to have an elevation of `beta` as seen from the point of projection. Find the initial velocity of projection.

Text Solution

Verified by Experts

Here the coordinate of `P(30 m, 40 m)`.
As we know the minimum velocity required to hit the amngo is
`V gt sqrt(g(y + sqrt(x^2 + y^2)`
`V gt sqrt(40 + sqrt(30^2 + 40^2))`
`gt sqrt (900)) rArr v gt 30 m s^-1`.
.
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