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# Solution for In a Block and Tackle System Consisting of 3 Pulleys, a Load of 75 Kgf is Raised with an Effort of 25 Kgf. Find: (I) the Mechanical Advantage, (Ii) Velocity Ratio and (Iii) Efficiency. - ICSE Class 10 - Physics

#### Question

In a block and tackle system consisting of 3 pulleys, a load of 75 kgf is raised with an effort of 25 kgf. Find: (i) the mechanical advantage, (ii) velocity ratio and (iii) efficiency.

#### Solution

Efficiency η = "𝑀.𝐴"/"𝑉.𝑅"= 3/3 = 1 𝑜𝑟 100%