Always moving away!

A projectile is launched at an angle \(\theta\) with initial velocity \(u\). Let \(\theta = \theta_{max}\) be the largest acute angle for which the projectile is always moving away from its launch point. Determine \(\lfloor\theta_{max}\rfloor\) (in degrees).

Details and Assumptions:

  • \(\bullet\) \(g \approx 10m/s^2\)
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