Answer:19.6 kJ
Explanation:
Given
mass of object [tex]m=100\ kg[/tex]
Object is at a height of [tex]h=20\ m[/tex]
Potential energy of an object depends upon datum . so Potential energy of object is
[tex]P.E.=mgh[/tex]
[tex]P.E.=100\times 9.8\times 20[/tex]
[tex]P.E.=19.6\ kJ[/tex]