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This tag is for the classical concept of forces, i.e. the quantities causing an acceleration of a body. It expands to the strong/electroweak force only insofar as they act comparable to ‘classical’ forces. Use [tag:particle-physics] for decay channels due to forces and [tag:newtonian-mechanics] or one of the other subtopics of [tag:classical-mechanics] for the dynamics of classical systems.

if you'll try to account for only some of the forces.) Here's an example which hopefully explains this in more detail: Stand next to a wall so that the wall is on your right-hand side. Push the … wall with all force you can without slipping. Now there are external forces acting on you: The wall pushes you left with force $N$, gravity pulls you down with force $G$, and between your feet and the …
answered Sep 6 '16 by JiK
sum of the forces acting on any system gives the acceleration of the centre of mass of the system. The forces acting on the chain are gravity and the force at the hinge. So the sum of these gives you …
answered Sep 6 '16 by JiK