Answer:
627200LJ
Step-by-step explanation:
Height of box=5 m
Side of square base=4 m
Volume of rectangular box=[tex]l\times b\times h[/tex]
Using the formula
Volume of rectangular box=[tex]4\times 4\times 5=80m^3[/tex]
Density of material=[tex]800kg/m^3[/tex]
We know that
[tex]Mass=Density\times volume[/tex]
Using the formula
Mass of rectangular box=[tex]80\times 800=64000 kg[/tex]
Gravity=[tex]g=9.8m/s^2[/tex]
Weight of rectangular box,F=[tex]mg=64000\times 9.8 N[/tex]
Let L be the vertical distance traveled by box
Total work done =[tex]W=F\times displacement[/tex]
Therefore,total work done against gravity =[tex]64000\times 9.8 L[/tex]=627200 L J
Hence, the box requires work against gravity=627200LJ
