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ICSE Class 10 Physics 2013 Paper

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A block and tackle system of pulleys has a velocity ratio 4.
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Question : 39 of 70
Marks: +1, -0
What is the value of the mechanical advantage of the given pulley system if it is an ideal pulley system?
Solution:  
 Given : V.R. =4 , Load =4T , Effort =T\text{ Given : V.R. }=4 \text{ , Load }=4 T \text{ , Effort }= T
 M.A. = Load  Effort \text{ M.A. } = \frac{ \text{ Load } }{ \text{ Effort } }
=4TT=4= \frac{4 T}{T} = 4
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