A block is accelerated with(adsbygoogle = window.adsbygoogle || []).push({}); a, take a look at the picture. There is a friction between the red block and the other one with massm1. The friction is given by the coefficientu1.

I have to determineasuch that the blue block is not moving relative to the red one.ahas to bi in depenence of anglealpha.

2. Relevant equations

The relevant equations are basically newton's equations.

3. The attempt at a solution

What I have done so far is the following: One force acting on the block is coming from the gravitional field, so F_g=m1*g. I have splitted this one in components: F||=sin(alpha)*F_g and (already added friction) F_s=cos(alpha)*F_g*(1-u1).

I don't know how I can go on. The basic problem is I don't really know howaacts one the block. And how I've to balance the forces.

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# Accelerated block

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