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It depends upon what units you are working in.

It depends on how much mass is involved.

A single electron traveling at near the speed of light will not hurt you - doubtful that you would even feel it. If it struck the retina of the eye you might see a flash of light.

A 300000kg granite block traveling at 1 meter per second is deadly.

Anything near your own bodily mass traveling at 2 m/s is approaching dangerous levels of momentum.

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15y ago

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