A train is moving on a straight track with an acceleration of 2.5 m/s2 .A projectile is thrown from a point on the floor of the train (assumed as origin in the train reference frame) at an elevation of 450 and with an initial velocity of 4m/s. The projectile is found to hit the floor at a distance of 1.6 m from the origin. Determine the angle between the position vector of the projectile when it returns to the direction motion of the train.

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Projectile Motion