A ball is to be shot from level ground with a certain speed. The figure shows the range R it will have versus the launch angle θ0. The value of θ0 determines the flight time; let tmax represent the maximum flight time. What is the least speed the ball will have during its flight if θ0 is chosen such that the flight time is 0.320tmax?

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irishboy123 · Answer

i have replied to this on the physics forum.  i think there may be a flaw in the question but i would need your feedback to explore that possibility.