Physics 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: Jwillis31Created on: 15-10-20 16:32 Kinetic Energy Kinetic energy=1/2xmassxspeed2 Ek=1/2mv2 1 of 22 Gravitational Field Strength GPE=massxgravitational field strengthxheight Ep=mgh 2 of 22 Power power=work done/timetaken = energy transferred/timetaken P=W/t P=E/t 3 of 22 Efficiency efficiency=useful energy output/total energy output effiency= useful power output/total power output 4 of 22 Electricity charge flow=currentxtime Q=IxT 5 of 22 Potential difference P.D.=current x resistance V=IxR 6 of 22 Resistance total resistance=resistance of component 1+resistance of component 2 Rr=R1+R2 7 of 22 Power Power=currentx P.D. P=IxV 8 of 22 Power 2 Power=(current)2x resistance P=I2 x R 9 of 22 Energy Transferred energy transferred= Power x Time E=Pt 10 of 22 energy transferred 2 energy transferred= charge flow x potential difference E=QV 11 of 22 Density Density=mass/volume p=m/v 12 of 22 Wave Speed Wave speed=frequencyx wave length V=f 13 of 22 Weight weight=massxgravitiational field strength W=m g 14 of 22 Work Done work done=force x distance (moved along line of action of the force) W=Fs 15 of 22 Force Force=spring constant x extension F=ke 16 of 22 Moment of a force Moment of a force= force x distance (perpendicular to the direction of force) M=Fd 17 of 22 Pressure Pressure=force normal to a surface/area of that suface p=F/A 18 of 22 Distance Distance travelled=speed x time s=vt 19 of 22 Acceleration acceleration= change in velocity/time taken final velocity-intial velocity/time taken a = v/t a= v-u/t 20 of 22 Resultant Force resultant force= mass x acceleration F=ma 21 of 22 Momentum momentum= mass x velocity p=mv 22 of 22
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