To: Noumenon
“Physics lessons (Newton’s Second Law of Motion: F=ma)...”
Off topic but in High School Physics I answered ‘F=ma’ on a quiz and it was marked incorrect. The teacher later argued thatit should have been Sigma F=ma, that is, the SUM of the forces equals mass times acceleration. So, FWIW...
That (obviously) dogs me to this day. I think she was a closet feminazi.
31 posted on
10/24/2012 8:48:45 AM PDT by
MichaelCorleone
('We the People' can and will take this country back...starting today.)
To: MichaelCorleone
She was correct, but needlessly nitpicky. F=ma is the correct and fundamental statement of Newton’s Second Law of Motion. The rest is an elaboration.
46 posted on
10/24/2012 10:05:50 AM PDT by
Noumenon
(“The other side wants everything in America to be free, except us.” -- Paul Ryan)
To: MichaelCorleone
From
wikipedia ...
The second law states that the net force on an object is equal to the rate of change (that is, the derivative) of its linear momentum p in an inertial reference frame:
The second law can also be stated in terms of an object's acceleration. Since the law is valid only for constant-mass systems,[19][20][21] the mass can be taken outside the differentiation operator by the constant factor rule in differentiation. Thus,
And thus F = ma. Your teacher was way off.
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