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प्रश्न
| 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?
उत्तर
In the upper fixed block, she adds extra pulleys to increase the mechanical advantage.
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संबंधित प्रश्न
State whether the following statement is True or False.
A pulley changes the direction of force.
Fill in the blank:
A pulley is used to change ........................
Select the correct alternative:
A pulley is used because of it
What is the mechanical advantage of an ideal pulley?
Answer the following in detail.
How does a pulley make work simpler?
Differentiate between a single fixed pulley and a single movable pulley.
A block and tackle pulley system has a velocity ratio 5. Draw a labelled diagram of this system. In your diagram, indicate clearly the points of application and the directions of the load and effort.
Give reason for the following:
The lower block of a block and tackle pulley system must be of negligible weight
In the case of a block and tackle arrangement, the mechanical advantage increases with the number of pulleys. Explain.
In a single movable pulley system, a load of 125 kgf is lifted by an effort of 75 kgf. Find the percentage efficiency of system.
