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Figure shows three blocks of mass m each...

Figure shows three blocks of mass m each hanging on a string passing over a pulley. Calculate the tension in the string connecting A to B and B toC?

Text Solution

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Net pulling force

=2mg -mg =mg
Total mass = m+m + m= 3m
Acceleration, `a=(mg)/(3m) =g/3`
Considering block A.
`T_(1) = mg = ma`
or `T_(1) = 4/3 mg`
Considering block C,
`mg -T_(2) = ma` or `T_(2) = mg - ma`
or `T_(2) = mg -(mg)/3 = 2/3 mg`
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