- #1
totallyclone
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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
Fun=ma
Ffs=μsFn
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:
Ffs=μsFn
Ffs=(0.30)(mgcos30°)
Ffs=(0.30)(5.0x9.8xcos30°)
Ffs=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?