Kinetic Energy
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The kinetic store and the KE equation
Anything moving holds energy in its kinetic store. The store's size depends on two inputs — the object's mass and its speed — but the speed input is squared, which makes fast objects dramatically richer in energy than slow ones of the same mass.
What you know already
Motion is the other place energy hides. One lesson prices it: the kinetic store of any moving object, set by its mass and by the square of its speed, with a worked calculation that keeps the squaring and the rounding honest.
Key points of understanding
- Kinetic energy is the energy a moving object carries, set by its mass and its speed.
- Every moving object carries energy in its kinetic store, whatever it is doing.
- KE = ½ × m × v², with mass in kilograms and speed in metres per second.
- The speed input is squared, so doubling the speed quadruples the energy in the kinetic store.
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1.The kinetic store and the KE equation
Anything moving holds energy in its kinetic store. The store's size depends on two inputs — the object's mass and its speed — but the speed input is squared, which makes fast objects dramatically richer in energy than slow ones of the same mass.
Key points
- Kinetic energy is the energy a moving object carries, set by its mass and its speed.
- Every moving object carries energy in its kinetic store, whatever it is doing.
- KE = ½ × m × v², with mass in kilograms and speed in metres per second.
- The speed input is squared, so doubling the speed quadruples the energy in the kinetic store.
Guided content from the SME authoring corpus — note rn_vR82ncPDnnyGQ94P, pinned at c40b8b284935 · promoted SyllabAI/syllabai-resources b3caaaa90c5e