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Pascal's Law

Why should th...

Question

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

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Solution

Lower block of this pulley system should be of negligible weight to increase the efficiency of the systyem.

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

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

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 $100 %$ .

(c) In case of a block and tackle system, the mechanical advantage increases with the increase in the number of pulleys.

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

Q. The pulley and string are shown in Fig. smooth and of negligible mass. For the system to remain in equilibrium, the angle

θ

Q. The pulleys and string shown in figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle

θ

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