- #1

gap0063

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## Homework Statement

Three blocks in contact with each other are

pushed across a rough horizontal surface by a

75 N force as shown.

The acceleration of gravity is 9.8 m/s2 .

[PLAIN]http://img178.imageshack.us/img178/6198/007ow.png

If the coefficient of kinetic friction between

each of the blocks and the surface is 0.076,

find the magnitude of the force exerted on the

3.5 kg block by the 4.1 kg block.

Answer in units of N.

## Homework Equations

sum of Fy=N-mg=0 => N=mg

sum of Fx= -fk=max

fk=uN

## The Attempt at a Solution

I have no clue how to figure out the force just between those two block...

Do I add the first two blocks together to act a one force against the third block?

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