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What if I was to ask a class "what are the forces acting on this
block?"? Well, there is the force due to tension in the cable, the
force due to friction between the block and the table, the force due to
gravity ...
Is this acceptable as an alternative to saying "the force of gravity"?
Is there a way of saying "normal force" other than to completely rename
it as "the force due to contact with the table"? Or is "normal force"
ok - like "frictional force" or "gravitational force"?
If we say that "there are four fundamental forces" is incorrect - what
do we propose to say instead? How about "there are four fundamental
sources of force"?