Work, Energy & Power — three ways to learn it.

The complete written lesson — W = Fd cos θ with positive, zero & negative work, work against gravity & friction, KE = ½mv² with derivation, PE = mgh, the work–energy theorem, conservation of mechanical energy with the falling-body table, power P = W/t = Fv, efficiency and the kilowatt-hour, with Tarbela-scale examples.

As you scroll, a live panel animates every idea: a crate is pulled at changing angles with a live W readout, PE and KE bars trade places during a fall but always sum constant, two workers race the same load up to a shelf, and energy flows through a machine — plus the real 3D pendulum and friction bench you can play with yourself.

Swing pendulums, slide blocks against friction and explore the energy apparatus on a safe, virtual bench. All of the course's hands-on physics apparatus lives here.