Answer 2_5_6
What is the potential energy of a 12 kg mass raised to a height of 25 m?
Potential Energy = weight x height change
Weight = 12 kg x 10 N/kg = 120 N
Height change = height at end - height at start = 25 - 0 = 25 m
Potential energy = 120 N x 25 m = 3000 J

Did you fall into the bear trap of using weight as kilograms?