For an object released at ground level, for any given release velocity, the maximum distance is achieved using an angle of approximately 45 degrees. However, as most implements in sport are released at a height above the ground, say from about shoulder height, the optimum angle at release is somewhat less than 45 degrees.
For example, for the shot put, the optimum release angle is 40-42 degrees, and for the hammer throw it is 43-44 degrees.
The actual ideal release angle can depend on the technique and physical attributes of the athlete. If the athlete can get a higher velocity at a lower angle, then there has to be a trade-off between the optimum release angle and maximum release velocity. This is often something that is worked out with trial and error over time.
- video analysis software for calculating angle of release