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

A block is placed against the vertical front of a cart. The coefficient of static frction between the block and the cart is [itex]\mu[/itex]_{s}. What acceleration must the cart have in order that the block does not fall? How would an observer on the cart describe the behavior of the block?

2. Relevant equations

F=[itex]\mu[/itex]_{s}*n

F=ma

3. The attempt at a solution

I have no idea how to start this problem. I know that the force pushing up on the block is equal to mg. I tried drawing acceleration as a horizontal vector, then setting a=mg, then trying to solve, but that didn't quite work out..

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# Acceleration with force of gravity and friction

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