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A stone is thrown from a bridge at an angle 30 degree with horizontal with a velocity 25m/s.If the stone strike the water surface after 2.5sec,calculate the height of bridge from the water surface.

User , 7 Years ago
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Amrit Raj

Last Activity: 7 Years ago

use the equation, S=ut+1/2at2                      ----------------1
here, u=30sin30degree(in vertical direction) & a=g=-10m/s2
let the height be H,
So,substituting vaues of S,a and t in eqn 1 ..we get
-H=25sin30degree*2.5-1/2*10*2.52
=0(theoritically)

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