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## Homework Statement

M1=5.0kg

μs1=0.30

M2=?

μs2=0.20

What does M2 need to be in order to move?

The interesting thing with this question is if it does move, will it move up or down?

## Homework Equations

F

_{un}=ma

F

_{fs}=μ

_{s}Fn

## The Attempt at a Solution

I thought about this and if it's going to go up, that's one mass. If it goes down, that's another mass so will there be two masses?

I also though, if it gave the static friction for both, maybe I thought of finding force of static friction for M1:

F

_{fs}=μ

_{s}Fn

F

_{fs}=(0.30)(mgcos30°)

F

_{fs}=(0.30)(5.0x9.8xcos30°)

F

_{fs}=12.7N

After that, I think there will be a force of tension and a parallel force of gravity on M1 and if you add all these up with Ff, it must add up to 0...or not since it is a connected to a pulley that is being pulled (or not), it won't add up to 0?