Two balls are projected from points A and B in vertical plane as shown in figure. AB is a straight vertical line. The balls can collide in mid air if `v_1//v_2` is equal to A. `(sintheta_1)/(sintheta_2)`B. `(sintheta_2)/(sintheta_1)`C. `(costheta_1)/(costheta_2)`D. `(costheta_2)/(costheta_1)`

Two balls are projected from points A and B in vertical plane as shown

1.	Two balls are projected from points A and B in vertical plane as shown in figure. AB is a straight vertical line. The balls can collide in mid air if `v_1//v_2` is equal to A. `(sintheta_1)/(sintheta_2)`B. `(sintheta_2)/(sintheta_1)`C. `(costheta_1)/(costheta_2)`D. `(costheta_2)/(costheta_1)`
Answer» Correct Answer - D d. If the particles collide in mid air, they travel same displacement in horizontal direction. So their velocity components along horizontal should be same, i.e., `v_1costheta_1 = v_2costheta_2`.

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Two balls are projected from points A and B in vertical plane as shown in figure. AB is a straight vertical line. The balls can collide in mid air if `v_1//v_2` is equal to A. `(sintheta_1)/(sintheta_2)`B. `(sintheta_2)/(sintheta_1)`C. `(costheta_1)/(costheta_2)`D. `(costheta_2)/(costheta_1)`

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