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The amount of work done by the labourer who carries n bricks, each of mass m, to the roof of a house whose height is h is A. n mgh B. mgh/n C. zero D. ghn/m

The amount of work done by the labourer who carries n bricks, each of mass m, to the roof of a house whose height is h is
A. n mgh B. mgh/n C. zero D. ghn/m

Grade:

2 Answers

Saurabh Koranglekar
askIITians Faculty 10336 Points
2 years ago
Dear student

The answer is option a

Regards
Vikas TU
14149 Points
2 years ago
We know work done=-P. E.
So, P. E. = mgh, for 1 brick
Now, For n brick P. E. =n×mgh
So, work done= nmgh ans.
where, g=acceleration due to gravity.

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