I have a general question about how to apply Newton's Second Law. When we write Fnet=ma, I am sometimes unsure of myself what the 'm' is in the problem.(adsbygoogle = window.adsbygoogle || []).push({});

For instance, when two masses (m1 and m2) are connected by a pulley is 'm' equal to m1+m2, or just the mass of interest?

How can I be absolutely sure of myself when I am solving problems using Newton's Second Law?

Does this have something to do with the technique of cutting (i.e. if two people are pulling opposite ends of a rope, then by cutting the rope, one can find the rope's tension.)?

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# Two Masses Connected by a Pulley

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