The lower block of a 'block and tackle' pulley system must be of negligible weight. Give reason.

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Solution

The lower block of the block and tackle pulley system should be of negligible weight to increase the efficiency of the system.

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Q. The lower block of a 'block and tackle' pulley system must be of negligible weight.

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.

Q. Why should the lower block of this pulley system be of negligible weight?

A block and tackle system of 5 pulleys consist of 3 pulleys in the upper block and 2 pulleys in the lower block. If the load is raised by 1 m, through what distance will effort move?

An ideal block and tackle system of 5 pulleys consist of 3 pulleys in the upper block and 2 pulleys in the lower block. If the load is raised by 1 m, through what distance will effort move.

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