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General
Easy
Question
An unknown mass, m1 , hangs from a massless string and descends with an acceleration g/2. The other end is attached to a mass m2 which slides on a frictionless horizontal table. The string goes over a uniform cylinder of mass 
and radius R (see figure). The cylinder rotates about a horizontal axis without friction and the string does not slip on the cylinder. Express your answers in parts b, c and d in terms of g, 
- Draw free-body diagrams for the cylinder and the two masses.
- What is the tension in the horizontal section of the string.
- What is the tension in the vertical section of the string.
- What is the value of the unknown mass
The correct answer is: Draw free-body diagrams for the cylinder and the two masses.
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