Exactly 3.0s after a projecttile is fired into the air from, Ask an Expert

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Exactly 3.0s after a projecttile is fired into the air from a flat grround, it is observed to have velocity v=(8.6i+4.8j) ms-1, where x is the horizontal and y axis is positive upward. Dertermine

(a) The horizontal angle of projectile.

(b) Its maximum height above the ground, and

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