Question

Fig, shows a block and tackle system pulleys used to lift a load. What is the mechanical advantage of the system?

• A. 6
• B. 8
• C. 4
• D. 2

Answer 1

Answer: (C)

4

Here it is $4$ pulley system hence total load on tackle(movable part) will be equals to "$4T$"
and on block(fixed part) total effort will be "$T$"
hence mechanical advantage(M.E)=$\frac{load}{effort}$=$\frac{4T}{T}$ =4