A boy walks 100 m with lifting a school bag on his shoulder. Is any work done by that boy
Answers
Answered by
14
There will be no work.
And the reason is...
The bag is appying a force downward and the boy is moving..
We know,
Work = Force *Displacement *Cos (theta)
we see in this case that the angle between force and displacement is 90°
which makes the theta 90°
And... the value of cos 90° is 0 which makes the whole work zero.
Hope you will understand!!
And the reason is...
The bag is appying a force downward and the boy is moving..
We know,
Work = Force *Displacement *Cos (theta)
we see in this case that the angle between force and displacement is 90°
which makes the theta 90°
And... the value of cos 90° is 0 which makes the whole work zero.
Hope you will understand!!
Answered by
2
Answer:
He has done no work.
Explanation:
because of cos
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