Hi there!
We know that:
Potential energy = mgh, where:
m = mass
g = acceleration due to gravity
h = height
We know that ΔPE = mgΔh = 1.47 kJ, so:
1.47kJ = mgΔh
Remember to convert kJ to J for simplicity: (1 kJ = 1000J)
1470J = mgΔh
Rearrange to solve for Δh:
1470/mg = Δh
1470/(60 · 9.8) = 2.5m
