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When one looks at an equation which relates physical entities, how
does your mind picture things?
eg F=ma
Do you picture F as a pushing by something -- a hand which is shoving
on a block?
Or is F the motion -- ie acceleration -- if a hand does happen to push?
eg W=dE
Do you picture W as the effort required -- a hand pushes a block over
a given distance?
Or is W the resultant energy of the pushing -- if the block were pushed?
Are F/W thought of as causes or effects?
Jim
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