The Work, Energy & Power Series
Eight exam-ready cards covering the complete chapter for JEE Main, JEE Advanced and NEET — every formula explained letter by letter, every idea built from everyday life, every trap decoded.
Work Done: When a Force Actually Achieves Something
Work = force × distance moved ALONG the force’s direction — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
Kinetic Energy and the Work-Energy Theorem: The Great Shortcut
Moving energy: KE = ½mv² — double the speed, QUADRUPLE the energy — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
Potential Energy: Stored Work, Ready to Strike
Stored energy from position: lifted = height energy (mgh), stretched = spring energy (½kx²) — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
Conservation of Energy: The Universe’s Perfect Bookkeeping
Total energy (KE + PE) stays constant when only conservative forces act — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
Power and Efficiency: How FAST You Can Do the Work
Power = work done per second (P = W/t) — the speed of energy transfer — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
Collisions: The Great Sorting — What Survives, What Dies
Momentum (mass × velocity) survives EVERY collision; energy often doesn’t — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
Springs and Vertical Circles: Energy in Two Classic Stages
Springs obey Hooke’s law: pull force = stiffness × stretch (F = kx) — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.
The Finale: Energy in the Real World, and the Complete Formula Card
Variable forces: work = area under the force-distance graph — with letter-by-letter formulas, graded examples, memory tricks and daily-life anchors.