(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Three boxes are stacked, one on top of the other. The mass of the top box is 4kg. The mass of the middle box is 3.5kg. The mass of the bottom box is 3.0kg. What is the force exerted by the middle box on each of the other boxes?

2. Relevant equations

Fg = mg

3. The attempt at a solution

Force exerted by the middle box on the upper box:

FN (normal force) = force of middle box on upper box

FN = mg = (3.5 kg + 3.0 kg) * 9.8 N/kg

FN = 63.7 N

Therefore the force of the middle box on the upper box is 63.7 N.

Force exerted by the middle box on the lower box:

Force of middle box on lower box = mg = (4.0 kg + 3.5 kg) * 9.8

Force of middle box on lower box = 73.5N

Therefore the force of the middle box on the lower box is 73.5 N.

Is this correct?

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# Homework Help: Forces Exerted on Objects in Contact

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