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Question
Is the above pulley system an ideal machine or not?
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Solution
No, the pulley system is not an ideal machine
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RELATED QUESTIONS
What is the mechanical advantage of an ideal pulley?
What is a block and tackle system of pulleys?
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The lower block of a block and tackle pulley system must be of negligible weight
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A type of single pulley is very often used as a machine even though it does not give any gain in mechanical advantage. Name the type of pulley used.
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Complete the table.
| S. No | Types of Simple Machine | Example |
| 1. | Pulley | |
| 2. | Wheel and axle | |
| 3. | Wedge | |
| 4. | Inclined plan | |
| 5. | Lever | |
| 6. | Screw |
| Meera chose to use a block and tackle system of '9' pulleys instead of a single movable pulley to lift a heavy load. |
Why should she connect more number of pulleys in the upper fixed block?
A block and tackle system of pulleys has a velocity ratio of 4.
- Draw a labelled diagram of the system indicating clearly the direction of the load and effort.
- Calculate the potential energy of the load 100 kgf lifted by this pulley to a height 5 m. (g = 10 ms−2)
