Posted by Sammy on Wednesday, October 24, 2012 at 7:32pm.
Well you know the force and mass.
So use this formula: F=ma.
F=250N
m=20kg
Just rearrange it and you will be able to get the maximum acceleration the sack can withstand before breaking.
lifted at constant velocity?
F=mg
lifted at a constant acceleration?
F=m(a+g) solve for a
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