##### physics help need urgent

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When a Coolie A lifts a load on the roof of a bus in 1 minute and another Coolie B lifts the same load on the roof of the bus in 2 minutes. How can their work done been same? I need explanation and with formula .thanks

Jul 12th, 2015

Coolie A done work in 1 minute

coolie B done work in 2 minute.

The work done is the same because they do not have taken distance as the formulae of the work is  W= Fdcosθ

and in this distance is same so work will be same.............

Thank you

Jul 12th, 2015

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Jul 12th, 2015

Hello there. I can understand this one that the distance is same. But I cannot understand this that when Coolie A has taken less time then he must have applied greater force than Coolie B who took more time. In that case force of coolie A is greater than of coolie B. Then how the work is same in both cases since W=F×S and F is not same in both cases .

Jul 12th, 2015

Dear in this weight lifted through a height   and in this way angle between force and displacement is same so thats why its the same.

Thanks

Jul 12th, 2015

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Jul 12th, 2015
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Jul 12th, 2015
Dec 6th, 2016
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