Question: A ball is to be shot from level ground with a certain speed. Figure shows the range R it will have versus the launch angle

A ball is to be shot from level ground with a certain speed. 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 0.500t max?

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