Please explain how velocity ratio is calculated in the given problems. Thank you

Asked by Suneel | 19th Dec, 2018, 07:41: PM

Expert Answer:

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1.a. let's assum effort provided by any person is T since it's the same string and it's been tied to pully at 3 places so the result would be  3 times as that of effort. That's why it's mechanical advantage is 3
You can also use tension method that over the pully tension got added. There 3 different places pully has been in contact with rope so tension would 3 time it's intial value.

Answered by Ankit K | 20th Dec, 2018, 10:21: PM