Objective questions regarding "projectile motion - 2 dimension". 1. The problem statement, all variables and given/known data There are 2 mini problems : 1. If t1 and t2 be the times of flight from A to B and "θ" be the angle of inclination of AB to the horizontal , then t12 + 2t1t2sinθ + t22 is (A.) independent of θ (B.) equal to 0 (C.) dependent on θ (D.) none of the above is correct. 2. If B has horizontal and vertical coordinates x,y referred to A , and the velocity of projection is √(2gh) , and the angle between the two paths at B is a right angle , then B lies on the ellipse , (A.) x2+2y2 = 2hy (B) x2 + y2 = 2hy (C) 2x2 + 2y2 = 2hy (D) x2+2y2 = 2hx 2. Relevant equations http://en.wikipedia.org/wiki/Trajec...tions_at_the_final_position_of_the_projectile 3. The attempt at a solution 1. Answer seems to be C but its not ! 2. I don't understand the question seriously. Language seems confusing to me !! Please help... Thanks in advance ..