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Year 9 Physics Revision - Coggle Diagram
Year 9 Physics Revision
Energy Stores
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Chemical- energy that can be transferred by chemical reactions involving foods, fuels and the chemicals in batteries
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Important Equations
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Efficiency- E= useful energy output / total input energy OR E= useful power output / total power input
Systems
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Whenever anything changes in a system, energy is transferred between its stores or to the surroundings
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Key Terms
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Work done (J)- done when an object is moved by a force because the force transfers energy to the object
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Energy Transfers
Forces (Mechanical Work)- energy is transferred when a force moves or changes the shape of an object
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