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The bloodstain pattern has a gravitational pull up to 5feet/sec. This would be calculated by width/length which is the Sin formula. The angle of impact formed in a circular pattern.

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This particular bloodstain has a force or 5 to 25 feet. This uses the Sin formula to calculate the length and width of this bloodstain. This bloodstain has just a little forces added to it to make the energy of the impact higher.

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The is a high velocity bloodstain which means that it is smaller in sizes. The angle of impact will be smaller due to the sizes of the spatter. This is more like a mist which can be like arterial blood spatter or someone coughing up blood.