- #1
ron_jay
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Homework Statement
In the three figures given in the attachment consisting of three atwood machines with, the blocks A, B and C of mass m have accelerations a1, a2 and a3 respectively.F1 and F2 are external forces of magnitude 2mg and mg acting on the first and third diagrams respectively.
How do the accelerations of the block differ and why is it so?
Homework Equations
Basic Newton's Laws of Motion equations.
The Attempt at a Solution
Acceleration of masses in atwood machine is given by:
[tex] a = (\frac{m_{2}-m_{1}}{m_{2}+m_{1}})g [/tex]
I really don't get it how the acceleration are not the same in each case as the forces add to the same?