Question

a box of mass 5kg falls from a height of 3m what is the energy of the box​

Answer 1

Acc. To me,

Your answer is 150J

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Here potential energy works

I take ground as a reference

ΔU= -W

W= mgh

=5*10*3

=150

ΔU= -150

Uf-Ui= -150

Uf=0----becz referance lvl

Ui=150J means box at 3m have energy 150 J

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I hope you understand my answer