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ICSE Class 10 Answered

Please explain how velocity ratio is calculated in the given problems. Thank you
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Asked by Suneel | 19 Dec, 2018, 07:41: PM
answered-by-expert Expert Answer
As per our policy one question is going to be answered in one url
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 | 20 Dec, 2018, 10:21: PM