- #1
edgarpokemon
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Homework Statement
The figure shows three blocks attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 4.80 kg, mB = 7.10 kg, and mC = 13.0 kg. When the blocks are released, what is the tension in the cord at the right?
Figure A is on the left, figure C on the right, C being the largest mass.
Homework Equations
For part A I got T-m1g=ma, (Because the tension will be more used when it gets pulled up)
For Part B, This is where i am confused, I originally used T1-T2=M2A, because I thought that since the Box B will move to the right, then its tension would be less because Box C is pulling more with M3g, but I checked the answer and it said T2-T1=M2A, but why is that the right answer
For Part C I got, M3g-T=m3a (since gravity will do most of the work
The Attempt at a Solution
I got the answer of -7.22 on my first attempt and 3.22 for the acceleration on the second, which 3.22 is the correct answer. Help! I am just confused in part B! [/B]