InterviewSolution
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InterviewSolution
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Two balls `A and B` are thrown with speeds `u and u//2`, respectively. Both the balls cover the same horizontal distance before returning to the plane of projection. If the angle of projection of ball `B is 15^@` with the horizontal, then the angle of projection of `A` is.A. `sin^-1 ((1)/(8))`B. `(1)/(2) sin^-1 ((1)/(8))`C. `(1)/(3) sin^-1 ((1)/(8))`D. `(1)/(4) sin^-1((1)/(8))` |
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Answer» Correct Answer - B (b) `(u^2 sin 2 theta)/(g) = ((u//2)^2 sin 30^@)/(g) = (u^2)/(8 g)` :. `sin 2 theta = (1)/(8)` or `theta = (1)/(2) sin^-1 ((1)/(8))`. |
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