Asked by Emperor Sam

A pulley system having 5 pulleys is used to raise a 450N load. find the mechanical advatange and hence the effort if the efficiency is 75%
Answered by bobpursley
it matters how the pulleys are connected.
Answered by Dean Brett
i know the mechanical advantage is the same as the velocity ratio. the MA and VR are equal to the number of pulleys which is equal to the number of parts in the rope or cable.

efficiency in this question is 75 percent of the MA or VR.

As how to find the effort im stuck on the same thing.... also looking for answers
Answered by Kenneth
I need it
Answered by Anonymous
I know this is a different question but I really need help with it.
A block and tackle system of pulleys consisting of 4 pulleys is used to raise a load of 500N through a
height of 20m. If the total work input in the pulley is equivalent to 10800J calculate,
i. velocity ratio of the system
ii. efficiency of the machine
iii. the mechanical advantage of the machine
iv. the effort applied.
It would be real great if someone responds like quick. Thanks..
Answered by SCIENCE
A Pulleys system having 5 Pulleys is used to raise a 450N Load . Find the Mechanical Advantage and Hence the effort if the Efficency is 75%.
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