Physics Help Forum Semi-Atwood Machine

 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

 Sep 28th 2009, 11:18 PM #1 Junior Member   Join Date: Sep 2009 Posts: 23 Semi-Atwood Machine I've uploaded a diagram of the problem. In the setup shown, m1 = 0.30kg, m2 = 0.45kg and theta = 11 degrees. Also, between the first block and the incline, coefficient of friction = 0.40. Assume the system moves so that the first block slides up the incline. (a) What is the acceleration of the system? (b) What is the tension in the string? I really have no idea how to start this. First, I suppose draw FBD for both m1 and m2. Then what should I do? I'll draw them and post them to see if I'm on the right track.. Attached Thumbnails
 Sep 28th 2009, 11:42 PM #2 Junior Member   Join Date: Sep 2009 Posts: 23 Here are my FBDs. I'm not really sure where to go from here though. Attached Thumbnails
 Sep 28th 2009, 11:49 PM #3 Junior Member   Join Date: Sep 2009 Posts: 4 answer that coefficient of friction, it is static friction or kinetic friction ?
Sep 28th 2009, 11:53 PM   #4
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Join Date: Sep 2009
Posts: 23
 Originally Posted by joephos that coefficient of friction, it is static friction or kinetic friction ?
Good question; it doesn't say...

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