Saturday, May 28, 2016

newtonian mechanics - Where does the reaction force act? Does it act on the centre of mass?


I know that the reaction force acts perpendicular to the surface in contact with the body. But where exactly (on the body) does it act?


When we deal with the forces on bodies of finite size, we usually refer to the force on the centre of mass.
What's our reference when it comes to reaction force? Where does it act?





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