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How is work equal to $Tds$ for an element of string in a transverse wave?
Assume that an infinitesimal element of a string is horizontal, and due to a wave passing on it, it's shape changes and is inclined as shown in the figure.
Assuming constant tension $T$ it's claimed ...
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D'Alembert's principle and the work done by constraint forces in Atwood's machine
From what I understand, constraint forces do no work because they are perpendicular to the allowed virtual displacements of the system. However, if you consider an unbalanced Atwood machine, in which ...
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