The compound or the block, and the tackle system uses:-

multiple fixed pulleys

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movable pulley

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a single movable pulley

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multiple fixed and movable pulleys

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Solution

The correct option is D
multiple fixed and movable pulleys

A block and tackle system comprises of multiple fixed and movable pulleys. This particular system helps in lifting heavy loads. One can see the arrangements of fixed and movable pulleys to have a mechanical advantage either 1 or greater than 1.

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Similar questions

State four differences between a single fixed pulley and a single movable pulley.

Give reasons for the following :

(a) In a single fixed pulley, the velocity ratio is always more than the mechanical advantage.

(b) The efficiency of a movable pulley is always less than $100 %$ .

(d) The lower block of a block and tackle pulley system must be of negligible weight.

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