# Science revision

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- Created by: rossbrooks123
- Created on: 28-04-16 19:46

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Kinetic energy

Physics revision

- Anything that moves has kinetic energy
- Kinetic energy is energy movement
- When an object is moving it has energy, this is its kinetic energy
- Mass and speed depend on somethings kinetic energy
- The bigger the mass, the faster it will go and therefore will have a bigger kinetic energy
- Trains, cars, airoplanes and speedboats will have losts of kinetic energy whereas someone pushing a trolley around will only have a small amount
- Formula:
**Kinetic energy = 0.5 x mass x speed2 (speed squared)**- E.g, a car with the mass of 1450kg is travelling at 28 m/s. Its kinetic energy =
**0.5 x 1450 x 28 (squared) = 568400** - If the mass is doubled, the KE is doubles. If the speed doubles the KE quadruples (x4). This is due to the v(squared) in the formula.
- Stopping distances…

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