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OCW Scholar - Physics I: Classical Mechanics
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OpenStudy (anonymous):
Can someone please explain to me how in lecture 7 he used Newton's second law to justify that Fs - mg = ma
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OpenStudy (anonymous):
Hi Manny, thats just the "force acing on a body" found by two different ways There are two forces acting on the body : gravity (pushing downwards (= -mg)) and the floor (pushing upwards = Fs). So the total force acting on the body = Fs - mg Force acting on a body (by definition) = ma Hence Fs - mg = ma Hope this helps...
OpenStudy (anonymous):
ma=FORCE, Fs=WORK,mg=WEIGHT. therefore, Fs-mg=ma
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