Physics · KS3 Y9 · Energy

Dissipation: energy spreading out

p19Free3:58Heddy Score 2 of 7, below the standard

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What you need to know

  • Energy can be held in stores such as kinetic and gravitational potential.
  • A change in a system moves energy from one store to another.

In this clip

0:28–1:05Energy stores and systemsgcse-phys-6-1-1-1
1:05–3:58Energy is always conservedp18
Also coversDissipation: energy spreading outp19
Heddy Score2/7, Below the standard
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · not judged yet. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
How the Heddy Score works

Why we picked it

Freesciencelessons lesson on energy stores and conservation using a pendulum; GCSE, also fine for Year 9.

Freesciencelessons on YouTubechecked 2026-10-16