(a) What two
properties of a liquid are used by a hydraulic machine? (2 marks)
(b) The clockwise
moment about point P, caused by the weight W, is 8 ´ 106 Nm.
Calculate, in
newtons, the size of the weight W.
Write down the
equation you need to use and show how you work out your answer. (2 marks)
(c) The maximum
weight that the crane can be used to lift is 5 ´ 105 newtons.
Explain why this
maximum weight must not be exceeded. (2 marks)
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