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Physics Quest

Physics Quest is a free, open school for physics, from first pushes and shadows to relativity and quantum physics, in three languages.

Part of a family of learning platforms with Math Quest, AI Gate and Qubit Quest.

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© 2026 Physics Questg = 9.81 m/s² · c = 299 792 458 m/s

Projectiles and Energy/Lesson 2 of 2

Experimenters· 530 nm

⚡

Work, kinetic and potential energy

Energy bookkeeping: find speeds and heights without ever drawing a force.

13 min 65 XP

Step 1 of 10

Bob

Forces tell you what happens moment by moment. Energy lets you skip straight to the answer: just compare the start and the end. It's the physicist's favourite shortcut.