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OpenStudy (anonymous):
15. A particle P is projected from a point O with an initial velocity of 60 m/s at an angle 30⁰ to the horizontal. At the same instant a second particle Q is projected in the opposite direction with initial speed 50 m/s from a point level with O and 100m from O. If the particles collide find the angle of projection of Q and find when the collision occurs.
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