ICSE Class 10 Answered
what is the First Method Of Combination Of Pulley ?
Asked by bhumitshah73.10spicertl | 27 May, 2020, 17:32: PM
When a heavy load is to be lifted or shifted from one place to another, we require a pulley system of MA> 2, so a single movable pulley is not enough. A combination of several pulleys is then used.
1. First Method : - Using one fixed pulley and other movable pulleys
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/de60513c4734d63c09e2e892846960185ecf62980cec40.75872239Firstcombinationofpulley.png)
Mechanical Advantage (M.A.)
![M. A. space equals space L over E space equals space 2 cubed space](https://images.topperlearning.com/topper/tinymce/cache/923945bcef5712b961b151042ac4eabe.png)
In general, if n movable pulleys are connected with one fixed pulley,
then
![M. A. space equals space 2 to the power of n](https://images.topperlearning.com/topper/tinymce/cache/596bcf7aa73ed42b5fd8a7637833b1f0.png)
If n movable pulleys are connected, then velocity ratio
![V. R. space equals space 2 to the power of n](https://images.topperlearning.com/topper/tinymce/cache/2b0042693e47caa68ec87eeb3188385c.png)
Answered by Shiwani Sawant | 28 May, 2020, 12:38: PM
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