Linked from
The 28 pages that link to Energy, each with the reason it gives.
MassRelated: Relativity relates an object's rest mass to its rest energy.
MechanicsRelated: Energy methods often solve motion problems without tracking every force.
Interactions and forcesRelated: Interactions transfer or transform energy as well as momentum.
Ludwig BüchnerRelated: His argument paired energy with matter as inseparable features of nature.
Physical phenomenaRelated: Energy transfer and transformation underlie many observable processes.