Physics Yr7 end of years 3.0 / 5 based on 1 rating ? PhysicsEnergyForcesOtherNone Created by: ams9Created on: 21-05-18 19:04 Speed, Distance & Time Speed=Distance÷Time Distance=SpeedxTime Time=Distance÷Speed 1 of 13 Density, Mass and Volume Density=Mass÷Volume Mass=DensityxVolume Volume=Mass÷Density 2 of 13 Weight, Mass & Gravity Weight=Mass x Gravity Mass=Weight÷Gravity Gravity=Weight÷Mass 3 of 13 GPE,Weight & Height GPE=Weight x Height Weight=GPE÷Height Height=GPE÷Weight 4 of 13 Conservation of Energy Law Energy cannot be created or destroyed. It may cahnge form, but the total mass stays the same. 5 of 13 Potential Energy Potential energy is stored energy. Chemical Energy Strain Energy Gravitational (GPE) Electric Energy 6 of 13 Kinetic Energy Kinetic Energy is moving energy. Sound Energy Wind energy Light energy Thermal energy Nucleur energy 7 of 13 Energy Transfers Energy can be transfered: By Heating Mechanically Electrically By Radiation 8 of 13 Unrenewable energy Once unrenewable energy has been used up, it is gone forever. Examples: Coal Petrol Oil Gas Nucleur Fuel =Fossil Fuels 9 of 13 Renewable energy Renewable energy cannot run out. Wind Solar Power Wave Biomass (wood) 10 of 13 Weight & Mass Mass is the amount of matter in an object. Units=Kg Weight is a force and is caused by the mass x the gravitational field strength. It is measured in N. 11 of 13 Friction Friction is the force that stops things moving or causes them to move more slowly. Friction occurs when two surfaces are in contact with each other 12 of 13 Balanced & Unbalanced forces If the forces on an object are unbalanced, it would cause the object to either speed up, change shape, or change direction. If forces are balanced, they are equal in size. 13 of 13
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