Which scientist proved experimentally that a shadow of the circular object illuminated 18. with coherent light would have a cent
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Answer:
The amount of work done in order to lift the box is
Explanation:
Given the weight of each box is
And the man lifts boxes at a height of
We need to find the amount of work done.
The amount of work done is the product of applied force that causes the displacement
.
In our problem force is and displacement is
.
Now, work done
So, the amount of work done in order to lift the box is