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what is the time of flight for a projectile each of these following case?

What is the time of flight for a projectile each of these following cases? Gravity is acting in the negative y-direction. a. A ball is thrown at 0° from the horizontal. It lands at Ax 6m, Ay--3m. b. A ball is thrown at 30° from the horizontal. It lands at ?? 10m,Ay Orn. c. A ball is thrown at 60° from the horizontal. It lands at Ax-3m, Ay 4m.

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