Mission Possible C

Q: What defines a pulley? Does a string pulled over a non-rotating corner count, if the string could move? Does it have to be a rotating element? Can it be pulled over the same rotating element multiple times? (section: 4 / paragraph: b / sub-paragraph: vii / line: 1)

A: The pulley does not need a rotating element. It can be pulled over the same pulley multiple times.