GCSE Revision Flashcards AQA Physics

A force is a vector quantity.What does this mean?Forces – AnIntroductionForces – AnIntroductionGCSE AQA Revision PhysicsA vector quantity, such asforce, has a direction as wellas a magnitude.The moment of aGCSE AQA Revision Physicsforce about a pivotis given by M Fd.Describe fully what drepresents.1Forces in ActionForces in Action1d is the perpendiculardistance from the pivot to theline of action of the force.constant pressure.The larger the area of surfaceon which the pressure acts,the larger the force on thatsurface. True or false?3GCSE AQA Revision PhysicsWhat is a typicalspeed for a person walking?Choose from:2.5 m/s1.5 m/s0.5 m/s4GCSE AQA Revision PhysicsWhich equation is used tosummarise Newton’s SecondLaw?5Pressure and PressureDifferencesGCSE AQA Revision PhysicsForces and MotionA liquid is under a2Forces and AccelerationForces and AccelerationForces and MotionPressure and PressureDifferences2True.Fp Aso F pA.For a particular pressure, p,the force F is proportional tothe area A.3A typical speed for a personwalking is 1.5 m/s.2.5 m/s would be running.0.5 m/s would be very slowwalking.4We can use this equation tosummarise Newton’s SecondLaw:force mass acceleration5

6GCSE AQA Revision PhysicsList factors that will increasethe braking distance of avehicle.7In the equationEe 1 ke2 for2calculating the elasticGCSE AQA Revision Physicspotential energy stored in astretched spring, what does krepresent and what is its unit?8Complete thissentence correctly.GCSE AQA Revision PhysicsOn a very cold day,a hut with thin metal wallswill cool down very quicklybecause of the metal’s low thermal conductivity high thermal conductivity9GCSE AQA Revision PhysicsWhat is the relationshipbetween wave speed, wavefrequency and wavelength?10Terminal Velocity andMomentumvelocity?Stopping and Brakingthat is falling at its terminalEnergy Stores andTransfersthe forces on an objectEnergy Transfers andResourcesWhat can you say aboutWaves and WavePropertiesTerminal Velocity andMomentumStopping and BrakingEnergy Stores andTransfersEnergy Transfers andResourcesWaves and WavePropertiesGCSE AQA Revision PhysicsThe resistive force actingupwards equals the weightacting downwards. The forcesare balanced and there is noresultant force on the object.6Factors that increase thebraking distance include:higher vehicle speed; ice,snow or water on the road;poorly functioning brakes;worn tyres; incorrectlyinflated tyres.7k is the spring constant of thespring, which is a measure ofits stiffness:force applied tospring k extensionThe unit of k is N/m.8On a very cold day, a hut withthin metal walls will cool downvery quickly because of themetal’s high thermal conductivity.The higher the thermalconductivity of a material, thehigher the rate of energy transferby conduction through thematerial.9wave speed frequency wavelength10

air. Describe its change ofdirection.11One type of seismicwave is a transversewave that cannotGCSE AQA Revision Physicstravel through aliquid. Another type of seismicwave is a longitudinal wave thattravels much faster.Give the names of each ofthese types of seismic wave.Which type ofelectromagneticradiation correctlyfills the gap inthese sentences?12GCSE AQA Revision PhysicsIn an energy efficient lamp, waves are produced by the gas insidewhen an electric current passes. Thesewaves are absorbed by thecoating on the lamp, which13then gives off visible light.Reflection, Refractionand Soundof high refractive index intoWaves for Detectionand Explorationa boundary from a materialLensesbetween a convex lens and aconcave lens.absorption of radiation, what ismeant by a perfect black body?15Light and Black BodyRadiationLight and Black BodyRadiationWhen we study emission andto the boundary) – unlessthe light is travellingperpendicular to theboundary, in which case itwill continue straight.11S-waves (secondary seismicwaves) are transverse andcannot travel through aliquid.P-waves (primary seismicwaves) are longitudinaland travel much faster thanS-waves.12A convex lens is thicker in the middlethan at the edges. Parallel rays oflight converge to the principal focusafter passing through a convex lens.A concave lens is thicker at the edgesthan in the middle. Parallel raysof light spread out (diverge) afterpassing through a concave lens, sothat they appear to have come fromthe principal focus on theside of the lens from which14they came.14GCSE AQA Revision Physicsnormal (the perpendicularUltraviolet (UV)GCSE AQA Revision PhysicsDescribe the difference(is refracted) away from theThe ElectromagneticSpectrumGCSE AQA Revision PhysicsLensesReflection, Refractionand SoundWaves for Detectionand ExplorationThe ElectromagneticSpectrumLight travels acrossThe light changes direction13A perfect black body absorbsall of the radiation incidenton it. It does not reflect ortransmit any of the radiation.15

across, the current throughand the resistance of acomponent in a circuit?16GCSE AQA Revision PhysicsState the behaviour of an LDR ina circuit when the light intensityfalling on it decreases.17State the equationGCSE AQA Revision Physicsfor calculating theelectrical power P of a deviceof resistance R, when thecurrent through it is I, andstate the unit of power.18State the coloursGCSE AQA Revision Physicsof the wires in the cable of adomestic appliance: the livewire, the neutral wire and theearth wire.An Introduction toElectricitythe potential differenceCircuits and Resistanceequation relatingCircuits and PowerGCSE AQA Revision PhysicsDomestic Uses ofElectricityAn Introduction toElectricityCircuits and ResistanceCircuits and PowerDomestic Uses ofElectricityWhat is thePotential difference current resistance16An LDR is a light-dependentresistor. Its electricalresistance increases when thelight intensity decreases.17Power P I 2 RThe unit of power is the watt,W (equivalent to J/s).18Live wire: brownNeutral wire: blueEarth wire: green and yellow(stripes)True or false?If all of the electricalGCSE AQA Revision Physicsenergy suppliedto an efficient kettle is used toheat the water, this equationdetermines the change intemperature of the water, θ. I V t m c θ2019Electrical Energy inDevicesElectrical Energy inDevices19True.The electrical energy supplied tothe kettle is power time I V t.The rise in temperature of thewater θ depends on the mass mand the specific heat capacity c ofthe water. Energy changeof water m c θ.20

What is meant by anelectric field?Static ElectricityStatic ElectricityGCSE AQA Revision PhysicsAn electric field is a regionaround an electrically chargedobject in which anotherelectrically charged object willexperience a force. is attracted to thenearest pole of the magnet.22GCSE AQA Revision PhysicsList the factors thataffect the size of the force ona current-carrying conductorin a magnetic field.A magnetic material broughtclose to a magnet is attracted tothe nearest pole of the magnet.The strong magnetic field neareither magnet pole makes thenearby magnetic material aninduced magnet and thisalways causes attraction.22The magnetic flux density, thesize of the current and theHT is always attracted to theN pole of the magnet.The Motor EffectGCSE AQA Revision PhysicsA magnetic material broughtclose to a magnet HTThe Motor EffectMagnetism andElectromagnetismWhich of thesesentence endingsmakes the statementcorrect?21Magnetism andElectromagnetism21length of the conductor that isin (and perpendicular to) themagnetic field.how does it work?24HTWhat is an alternator and23Induced Potential andTransformersGCSE AQA Revision PhysicsHTInduced Potential andTransformers23An alternator is anelectromagnetic device thatgenerates an alternatingcurrent. A magnet rotates closeto a coil of wire. The changingmagnetic field through the coilinduces an alternating potentialdifference between its ends andso generates an alternating24current in its circuit.What is theGCSE AQA Revision Physicsdifference between thespecific heat capacity andthe specific latent heat of amaterial?25Particle Modelof MatterParticle Modelof MatterSpecific heat capacity is the energyneeded to raise the temperatureof 1 kg of the material by 1 C,with no change of state.Specific latent heat is the energyneeded to change the state of1 kg of the material, with nochange in temperature.25

neutrons protons26Complete the gapsin the sentences.Choose from:GCSE AQA Revision Physicsgreater smallermore lessBeta radiation has a ionisingpower than alpha radiation andso is penetrating and has a range in air.A beta source a few metres awayfrom you is therefore likelyto be dangerous than an27alpha source at that distance.GCSE AQA Revision PhysicsState two definitions ofradioactive half-life.28GCSE AQA Revision PhysicsHow does a chain reactionstart during nuclear fission?29GCSE AQA Revision PhysicsWhat is meant by a mainsequence star?30Atoms and Isotopesthe same number of Nuclear RadiationIsotopes of an element containUsing RadioactiveSourcesthis sentence.Isotopes of an elementcontain the same number ofprotons.They have different numbersof neutrons.26Beta radiation has a smallerionising power than alpharadiation and so is morepenetrating and has a greaterrange in air.A beta source a few metresaway from you is thereforelikely to be more dangerousthan an alpha source at thatdistance.271. The half-life is the (average)time taken for half of theradioactive nuclei in asample to decay.2. The half-life is the timetaken for the activity (orcount rate) of a radioactivesample to fall to half itsoriginal value.28Fission and FusionGCSE AQA Revision Physicsword to completeDuring fission, a large nucleussplits into two smaller onesand two or three neutrons areemitted with kinetic energy.Fission can be initiated bya large nucleus absorbinga neutron. So the neutronsemitted from the first fissioncan go on to cause fission oftwo or three other nuclei,and so the process continues29and escalates.Stars and the SolarSystemAtoms and IsotopesNuclear RadiationUsing RadioactiveSourcesFission and FusionStars and the SolarSystemChoose the correctA main sequence star is in thestable part of its lifecycle. There isequilibrium (a balance) betweenthe inward gravitational collapseof the star and the outwardexpansion of the star due toenergy from fusion of hydrogenin the star’s core.30

How does red-shift provideevidence supporting the BigBang theory?31Orbital Motion andRed-ShiftOrbital Motion andRed-ShiftGCSE AQA Revision PhysicsLight from all distant galaxiesshows red-shift – an increasein wavelength – which tells usthey are all moving away fromus. More distant galaxies havegreater red-shift, which meansthey are moving away withgreater speed. This agrees withthe Big Bang theory, whichproposes that the universebegan from a very small, hotand dense region.31

Forces – An Introduction Forces in Action Pressure and Pressure Differences Forces and Motion Forces and Acceleration A force is a vector quantity. What does this mean? The moment of a force about a pi