Posted by **Anonymous** on Tuesday, October 15, 2013 at 8:55pm.

Mary applies a force of 77 N to push a box with an acceleration of 0.45 m/s2. When she increases the pushing force to 82 N, the box's acceleration changes to 0.74 m/s2. There is a constant friction force present between the floor and the box.

(a) What is the mass of the box?

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