Explain work, energy and power with a simple example
The short version: work, energy and power refers to the connected ideas of energy transferred by a force, stored energy and the rate of transfer. A quick example makes it concrete — Lifting 10 kg by 2 m needs about 196 J of work.
How to approach it step by step
Once one example makes sense, the method generalises: use W = Fd cos θ, apply conservation of energy, then divide by time for power. In a visual interactive session the example is built on screen piece by piece, so you see which quantity changes at each step instead of only reading a final answer. Ask for a harder variant and the explanation adapts on the spot.
Worked example
Lifting 10 kg by 2 m needs about 196 J of work.
The mistake most learners make
Including force components that are perpendicular to the displacement, which do no work.
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