ch05-p079 - 79. The certain force denoted F is assumed to...

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12 21 2 1 1 2 (/ )(/) aa FF a m m Fa a a == = ++ + which yields a = 2.6 m/s 2 . 79. The “certain force” denoted F is assumed to be the net force on the object when it gives m 1 an acceleration a 1 = 12 m/s 2 and when it gives m 2 an acceleration a 2 = 3.3 m/s 2 . Thus, we substitute m 1 = F / a 1 and m 2 = F / a 2 in appropriate places during the following
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