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rrosa522
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Homework Statement
Two boxes of books are stacked and placed on the floor of an elevator.
the masses of the bottom and top boxes are 9.5kg and 2.5kg respectively. The normal force between the floor and the bottom box is 70N.
Determine the force that the larger box exerts on the smaller box.
Homework Equations
f=ma
The Attempt at a Solution
The answer is 15N {up} . I got 93 N. (9.81m/s^2 *9.5kg)