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Question

The mechanical advantage of a combination of three movable pulleys with a fixed pulley will be

A
4
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B
8
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C
2
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D
16
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Solution

The correct option is B 8
In this quetion refer fiq. as shown.
The effort here is define as F
And Load as R
R is define by relation to F
F=R2N,where N is number of puley attached to system
Using MA=RF and N=3
we get MA=8
792088_187718_ans_83f799fdcea142a79ff30703f4c40b2b.png

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