The student 2 did the MOST work because he pushed the box to a greater height.
The given parameters:
The work done by student 1 is calculated as follows;
Work = P.E = mgh
P.E = 1.2mg
The work done by the student 2 is calculated as;
P.E = 5mg
where;
Thus, we can conclude that the student 2 did the MOST work.
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