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## Homework Statement

Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force

*F*P = 9.3 N. Here A has a mass

*m*A = 10.6 kg and B has a mass

*m*B = 7.0 kg. The contact force between the two boxes is Fc

The coefficient of kinetic friction between the boxes and the floor is 0.04. (Assume fp acts in the +x direction)

a) What is the force exerted on

*m*B by

*m*A? In other words what is the magnitude of the contact force

F[PLAIN]https://www.webassign.net/wastatic/wacache8d5e957f297893487bd98fa830fa6413/watex/img//rightharpoonhead.gifC? [Broken]

(c) If Alex were to push from the other side on the 7.0-kg box, what would the new magnitude of

F[PLAIN]https://www.webassign.net/wastatic/wacache8d5e957f297893487bd98fa830fa6413/watex/img//rightharpoonhead.gifC [Broken] be?

## Homework Equations

A=Fp-f/M

**3. The 0**

attempt at a solution

attempt at a solution

contact force =force-friction-ma

Friction= (0.04)(17.6*9.8)

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