Question

in block and tackle system mechanical advantage increase with increase in the number of puleys
Pls help

Answer 1

hello user !

>> So, basically your query is why mechanical advantage increase with increase in the number of pulleys in block and tackle system .

•OK, so the reason is that : In block and tackle system of pulleys, the mechanical advantage is calculated using formula -
$ma = {2}^{n} \\ where \: n = number \: of \: pulleys \\ ma \: = mechanical \: advantage$

now, let n = 1 , then M.A (1) = 2^1 = 2.
now, let n = 2 , then M.A (2) = 2^2 = 4.

conclusion - M.A(2) > M.A(1) , showing that with more number of pulleys ie greater value of n , provides increase in mechanical advantage is more M.A.

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Thank you . Doubts are most welcome :)