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Opteron
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Homework Statement
A man with a mass of 100kg stands on a scale with a sack of potatoes weighing 20kg. He throws the sack straight up. At the instant before he releases the sack, what does the scale read, in kg?
Homework Equations
n/a
The Attempt at a Solution
I assumed that because the sack had sufficient velocity to overcome gravity and continue moving once released, its mass is negligible with respect to the scale, and the scale should read 100kg
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