a 300g mass hangs at the end of a string. A second string hangs from the bottom of that mass and supports a 900g mass. (a) find the tension in each string when the mass are accelerating upward at 0.700m/s^2. (b) find the tension in each string when the masses are accelerating downward at 0.700m/s^2.
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x is the comparison of an unknown quantity with a known quantity.identify 'x'
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