Asked by Majiri
A block and tackle system is used to lift a load of 20X through a vertical height of 10.5m. If the
efficiency of the system is 40%, how much work is done against friction?
efficiency of the system is 40%, how much work is done against friction?
Answers
Answered by
bobpursley
work done: loadweight*height
I don't know what you mean by 20x.
work input= workdoneabove/.4
friction= workinput-workdone
= workdone(1/.4 -1)=workdone*.6/.4
I don't know what you mean by 20x.
work input= workdoneabove/.4
friction= workinput-workdone
= workdone(1/.4 -1)=workdone*.6/.4
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