question_answer

Two identical smooth balls are projected from points O and A on the horizontal ground with same speed of projection. The angle of projection in each case is \[30{}^\circ \](see figure). The distance between O and A is 100m. The balls collide in mid air and return to their respective points of projection. If the coefficient of restitution is 0.7, the speed of projection of either ball (in m/s) correct to nearest integer is 19x m/s. Find x. (Take g = 10 \[m{{s}^{-2}}\]and \[\sqrt{3}\]= 1.7)

Answer:

2.00