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Projection Under uniform Acceleration

 A body is projected at an angle of 30° with the horizontal and with a speed of 30 ms-1. What is the angle with the horizontal after 1.5 s ? (g = 10 ms-2)


The time of flight is given by
Thus, after 1.5 s, the body will be at the highest point. 
 So the direction of motion will be horizontal after 1.5 s, the angle with the horizontal is 0°.

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