Work, Energy and Power notes
OpenThe 4 formulas you need for Work, Energy and Power, on one page.
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Physics · printable
Work, Energy and Power: One-Page Formula Sheet
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Last updated: 26 October 2026
Formula sheet
Work, Energy and Power formulas
Work, Energy and Power — formula sheet
Formulas
- W = ∫F·ds, KE = ½mv²
- Spring PE = ½kx²
- Power P = F·v
- 1D elastic collision: v₁ = ((m₁−m₂)u₁ + 2m₂u₂)/(m₁+m₂)
Key ideas
- Work–energy theorem: total work = change in kinetic energy
- Conservative force: F = −dU/dx; equilibrium where dU/dx = 0
- Momentum is conserved in all collisions; kinetic energy only in elastic ones
- Coefficient of restitution e = separation speed / approach speed
Traps to avoid
- Ignoring work by friction or normal force on a moving incline
- Using energy conservation when a non-conservative force does work
- Wrong sign of work done by gravity
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FAQs
Frequently asked questions
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Read it once a day for a week, then cover it and write the formulas from memory. Revise only the ones you missed.