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प्रश्न
The given figure shows an arrangement of moving and fixed pulleys. Copy the diagram and show the direction and magnitude of forces exerted by the four strings marked 1 to 4. What is the load that can be lifted by the effort E? Calculate the mechanical advantage of this system.
आकृती
संख्यात्मक
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उत्तर
1. The lowest movable pulley directly carries the load and is supported upwards by two string segments: String 2 and String 4.
Total Load (L) = Force in String 2 + Force in String 4
= 2E + 2E
= 4E
2. Mechanical advantage is calculated as the ratio of the load lifted to the effort applied:
Mechanical Advantage (MA) = `"Load (L)"/"Effort (E)"`
= `(4E)/E`
= 4
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