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प्रश्न
The diagram below shows a pulley arrangement :
(i) Copy the diagram and mark the direction of tension on each strand of the string.
(ii) What is the velocity ratio of the arrangement ?
(iii) If the tension acting on the string is T, then what is the relationship between T and effort E ?
(iv) If the free end of the string moves through distance x, find the distance by which the load is raised.
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उत्तर
(i)
(ii) The load rises to `x/2`
∴ velocity ratio is 2
(iii) `T/2 = E`
(iv) `x/2`
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संबंधित प्रश्न
Is the above pulley system an ideal machine or not?
State two functions of a machine.
The mechanical advantage of an actual pulley is less than one. Give a reason. What is the justification for using the pulley then?
Define the following term in reference to a gear system for Gain in speed ?
Name the type of single pulley that can act as a force multiplier. Draw a labelled diagram of the pulley mentioned by you.
What is the use of a fixed pulley?
Give a reason for the following:
In a single fixed pulley, the velocity ratio is always more than the mechanical advantage.
Give reason for the following:
The efficiency of a pulley is always less than 100%
What is a block and tackle system of pulleys?
A man raises a load of 360 kgf using a block and tackle system of 3 pulleys. If the efficiency of the pulley system is 60%, what effort is applied by the man?
