The instant of time at which the velocity of the stone makes an angle 45 with x axis
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Vx = u Cosθ
Vy = u Sinθ - g t.
θ = angle of projection.
u = speed of projection.
Given Tan 45° = Vy/ Vx
So t = u(Sinθ - Cosθ)/g
Vy = u Sinθ - g t.
θ = angle of projection.
u = speed of projection.
Given Tan 45° = Vy/ Vx
So t = u(Sinθ - Cosθ)/g
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