If two objects are projected from same point with an angle 'alpha' and 'beta' with velocity v1 and v2 .what will be the time at which the velocity vector of the projectiles will be parallel?
Velocity of particle 1 after t time = Vcos A i + (Vsin A - gt)j
Similarly velocity of particle 2 after t time= v cos B I +(v sin B - gt)j
As we need to find time in which both these will be parallel
Therefore [ Vcos A i + (Vsin A - gt)j ] X [ v cos B I +(v sin B - gt)j ] = 0
Now calculate yourself
whats the answer