Ok not negligible, i misspoke. I assumed that since that since F(of the sack on the person)=ma and the acceleration was positive rather than negavite, the sack did not contribute anything to the force of the person on the scale.
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...