Physics P1.2 USING ENERGY 0.0 / 5 ? PhysicsCore physicsP1EnergyGCSEAQA Created by: 12dalelCreated on: 11-11-16 16:42 What types of energy are there? -Kinetic energy -chemical energy -Gravitational potential energy -Elastic potential energy -Electrical energy 1 of 9 What is the conservation of energy? Energy cannot be created or destroted 2 of 9 What is useful energy? Energy transferred to where it is wanted in the form that its wanted 3 of 9 What is wasted energy? Energy that isn't usefully transferred 4 of 9 What eventually happens to wasted energy? It gets spread out into the surroundings 5 of 9 Why does energy get less useful after we use it? As energy spreads out it gets harder to use it for further energy tranfers 6 of 9 What is meant be efficiency? Useful energy / total energy supplied x 100 7 of 9 How efficient can a machine be? A machine can never be 100% efficient as energy is always wasted 8 of 9 How can efficiency be improved? By reducing : - friction - air resistance - electrical resistance -vibrations (noise) 9 of 9
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