A2Unit4

A2 Unit 4 : PHYA4 : Further Mechanics & Fields This page supports the lessons for the first unit of the year 13 A2 qualification:

Khan Academy: Introduction to Harmonic Motion || || [|Jack Knife Protection] [|Unstable Caravan Jack knife] [|Damping & Resonance @ Salford] [|Animation showing how g changes around the Earth] [|Balloons & Static] [|John Travoltage] [|Gold Leaf Electroscope] [|More anvanced Electroscope] [|Another Electroscope] [|Petrol Pump Explosion Caused by Static] [|ElectroStatic Discharge] ||
 * **Lesson** || **Notes** || **Resources & Links** ||
 * **1** || **Introduction to A2** || [[file:AQAPhysicsA.pdf]][[file:Unit4PHYA4.pdf]][[file:A2TextBooks.doc]] ||
 * **2** || **Momentum 1**
 * To understand what momentum is
 * To understand conservation of momentum and to be able to complete related calculations
 * To understand different types of collision, to be able to complete related calculations and to be able to classify a collision as either elastic or inelastic || [[file:A2_Unit4_02_Momentum_01.ppt]][[file:PastQuestion_A2_01_Momentum_HSW.pdf]] ||
 * **3** || **Momentum 2**
 * To revisit Newton’s 2nd law in terms of momentum.
 * To define the impulse of a force and connect it to the change in momentum
 * To understand the significance of the area under a force v time graph
 * To be able to complete “impulse of a force” calculations
 * To revisit car safety || [[file:A2_Unit4_03_Momentum_02.ppt]][[file:PastQuestion_A2_02_Momentum_GolfClub.pdf]] ||
 * **4** || **Momentum 3**
 * To Summarise what has been learnt about momentum by looking at real world examples.
 * Rebound impacts including oblique impacts
 * Dropped balls
 * Explosions & Guns
 * Rockets & Water jets || [[file:A2_Unit4_04_Momentum_03.ppt]] ||
 * **5** || **Circular Motion 01**
 * To summarise the relationship between degrees and radians
 * To understand the term angular displacement
 * To define angular velocity
 * To connect angular velocity to the period and frequency of rotation
 * To connect angular velocity to linear speed || [[file:Physics_A2_Unit4_05_CircularMotion_01.ppt]][[file:PastQuestion_A2_03_BlockStoppingDistanceHSW.pdf]] ||
 * **6** || **Centripetal Force**
 * To consider speed & velocity around a circle
 * To consider acceleration as a change in velocity
 * To define an equation for centripetal acceleration
 * To define an equation for centripetal force || [[file:Physics_A2_Unit4_06_CentripetalForce.ppt]][[file:PastQuestion_A2_04_BlockStoppingDistanceHSW.pub]] ||
 * **7** || **Banked Tracks**
 * To show that the centripetal force is provided by real world forces such as tension, gravity & friction
 * To consider three particular cases of motion:
 * Over the top of a hill or humped back bridge
 * Around flat curves (roundabouts)
 * Around banked curves || [[file:Physics_A2_Unit4_07_BankedTracks.ppt]] ||
 * **8** || **Fairgrounds**
 * To apply what we have learnt about circular motion to rides at the fairground
 * To consider three particular cases of motion:
 * The big dipper
 * The long swing
 * The “centrifuge” wall of death || [[file:Physics_A2_Unit4_08_FairGrounds.ppt]] ||
 * **9** || **Oscillations**
 * To introduce some common examples of simple harmonic motion
 * To __define__ some common terms such as period and frequency
 * To //__think__// about the phase relationship between displacement, velocity, force & acceleration || [[file:Physics_A2_Unit4_09_Oscillations.ppt]] ||
 * **10** || **Principles of Simple Harmonic Motion**
 * To arrive at the relationship between displacement, velocity and acceleration for a system in SHM
 * To be able calculate the magnitude & direction of the acceleration at any time for an object in SHM
 * To be able calculate the magnitude & direction of the acceleration at any time for an object in SHM
 * **11** || **SHM Displacement and Velocity**
 * To investigate the relationship between circular motion and SHM
 * To be able to calculate the displacement at any particular moment under different starting conditions
 * To be able to calculate the velocity at any particular moment. || [[file:Physics_A2_Unit4_11_DisplacementVelocity.ppt]] ||
 * **12** || **Simple Pendulum Practical** || No slides ||
 * **13** || **Simple Pendulum Theory**
 * To establish which factors influence the period of a pendulum
 * To understand how the period of a simple pendulum can be used to establish a value for g experimentally || [[file:Physics_A2_Unit4_13_SimplePendulum.ppt]] ||
 * **14** || **SHM Application 2. Mass of a spring**
 * To recognise that a loaded spring is an application of SHM
 * To review Hooke’s law
 * To establish the period of an oscillating loaded spring
 * To review springs in parallel & series || [[file:Physics_A2_Unit4_14_SHM_MassAndSpring.ppt]][[file:PastQuestion_A2_06_LoadedSprings.pdf]][[file:PastQuestion_A2_05_CircularMotion.pdf]][[file:PastQuestion_A2_04_WorkedExample.pdf]] ||
 * **15** || **Damping**
 * To be able to answer the question //“What is Damping?”// || [[file:Physics_A2_Unit4_15_Damping.ppt]] ||
 * **16** || **SHM and Energy**
 * To understand the energy transformations which take place during simple harmonic motion || [[file:Physics_A2_Unit4_16_SHM_Energy.ppt]] ||
 * **17** || **Resonance**
 * [|Tacoma Bridge]**
 * [|London Millenium Bridge]**
 * [|The Opening of the Millenium Bridge]**
 * To Understand resonance
 * To be able to qualitatively explain how a system behaves at resonance and on either side of resonance in terms of amplitude & phase
 * To look at some real world examples of resonance || [[file:Physics_A2_Unit4_17_Resonance.ppt]] ||
 * **18** || **Gravitational Fields 01**
 * To understand what we mean by gravity
 * To understand how we represent a gravitational field
 * To look at radial and uniform fields
 * To understand what we mean by the strength of a gravitational field
 * To revisit what we mean by //“g”// || [[file:Physics_A2_Unit4_18_GravitationalFields01.ppt]][[file:PastQuestion_A2_04_SimplePendulum.pdf]] ||
 * || **No lesson Y7 CATs cover** ||  ||
 * **17** || **Slight cock-up! An extra SHM lesson was required and is numbered as 13B above** || Fully worked example for PQ A_04 ||
 * **19** || **Gravitational Fields 02**
 * To investigate the value of //g// on other planets in our solar system & to practice our graph drawing and other practical skills
 * To recreate some of Newton’s work on gravitation & to establish Newton’s law of gravitation
 * To use Newton’s law to establish the gravitational force of attraction between two objects || [[file:Physics_A2_Unit4_19_GravitationalFields02.ppt]][[file:GravitationQuestions01.doc]][[file:PastQuestion_A2_07pendulum_08massSpring.pdf]][[file:PastQuestion_A2_MS_05_06.pdf]][[file:PlanetData.xls]][[file:PlanetPupilData.doc]] ||
 * **20** || **Gravitational Fields 03**
 * To investigate how the gravitational field strength varies as you move away from a planet and also inside the planet
 * To __begin__ to explore the concept of Gravitational potential || [[file:Physics_A2_Unit4_20_GravitationalFields03.ppt]] ||
 * **20** || **Gravitational Fields 04**
 * To __continue__ to explore the concept of Gravitational potential
 * To examine gravitational potential near a spherical planet || [[file:Physics_A2_Unit4_21_GravitationalFields04.ppt]][[file:WorkDoneAreaGraph.pdf]] ||
 * **21** || **Satellites**
 * To do some sums!
 * To define what a satellite is
 * To describe two popular types of orbit for man-made satellites
 * To connect Satellite motion with circular motion
 * To look at Kepler’s third law || [[file:Physics_A2_21_Satellites.ppt]][[file:KeplerSums.xls]] ||
 * **22** || **Static Electricity 01**
 * To examine the concept of Electric field strength (two ways)
 * To examine the factors which affect the nature of an electric field || [[file:Physics_A2_Unit4_23_StaticElectricity01.ppt]] ||
 * **23** || **Electric Field Strength**
 * To recap what we can remember from Y11 about static electricity || [[file:Physics_A2_Unit4_23_ElectricFieldStrength.ppt]] ||
 * **24** || **Coulombs Law**
 * To look at the work of Charles Coulomb
 * To understand electric potential || [[file:L24_A2_2009_10_CoulombsLaw.ppt]][[file:Year 13 Unit 4 Revision HW.doc]] ||
 * || **Half-Term Revision for Further Mechanics Exam. Open book exam and mark scheme** || [[file:Y13_Autumn_OpenBook.pdf]][[file:MS_Y13_Autumn_OpenBook.pdf]] ||
 * **25** || **Revision for further mechanics, (nothing new just merged powerpoints)** || [[file:L25_A2_2009_10_FurtherMechanicsRevision.ppt]] ||
 * **26** || **Resonance (by popular demand). Inserted above as 15B** ||  ||
 * **27** || **Electric Field Catchup Lesson (After return from sickness)** || [[file:ElectricFieldPastQuestions.pdf]][[file:MS_ElectricFieldPastQuestions.pdf]] ||
 * **28** || **Point Charges**
 * Comparing Gravitational and Electric fields**
 * To understand what we mean by “point charge”
 * To consider field strength as a vector
 * To apply our knowledge of equipotentials to electric fields
 * To understand what is meant by potential gradients || [[file:Physics_A2_28_PointCharges.ppt]][[file:FieldComparison.doc]] ||
 * **29** || **How Electric Fields Vary with distance**
 * To investigate how Electric field strength and Electric potential vary with distance || [[file:Physics_A2_29_HowElectricFieldsVaryWithDistance.ppt]] ||
 * **30** || **Capacitors 01**
 * To understand what a capacitor is
 * To understand their applications
 * To understand how we define capacitance || [[file:Physics_A2_30_Capacitors01.ppt]][[file:ConstantCurrentResults.xls]] ||
 * **31** || **Energy Stored in a Capacitor**
 * To understand that when a capacitor is charged it stores energy
 * To be able to calculate the amount of energy stored
 * To be able to solve problems involving the energy stored in a capacitor || [[file:Physics_A2_31_CapacitorsEnergyStored.ppt]] ||
 * **32** || **Charging & Discharging through fixed resitors**
 * To qualitatively understand how a capacitor discharges through a resistor
 * To derive the equation which defines this rate of discharge
 * To be able to solve capacitor discharge problems || [[file:Physics_A2_32_CapacitorsDischargeThroughFixedResistor.ppt]] ||
 * **33** || **Capacitor Summary**
 * To look at how capacitor discharge may be examined in the lab
 * To revisit capacitor applications (particularly timing circuits)
 * To understand charging a capacitor through a fixed resistor || [[file:Physics_A2_33_CapacitorsSummary.ppt]] ||
 * **34** || **Magnetc Fields Introduction**
 * To recap the nature of the magnetic field around a bar magnet & the Earth
 * To understand the nature of the magnetic field around a current carrying wire
 * To be able to calculate the magnitude & direction of the force on a current carrying wire in a magnetic field || [[file:Physics_A2_34_CurrentCarryingConductorsInAMagneticField.ppt]] ||
 * **35** || **Electric Motors & Forces on Charged particles**
 * To apply are knowledge about electromagnetic behaviour to electric motors
 * To understand __moving__ charges in magnetic fields
 * To derive an equation for the force experienced by moving charges in magnetic fields || [[file:Physics_A2_35_MotorsAndParticles.ppt]] ||
 * **36** || **Charged Particles in Circular Orbits**
 * To understand that the path of a charged particle in a magnetic field is circular
 * To equate the force due to the magnetic field to the centripetal force
 * To examine practical applications of circular displacement of particles || [[file:Physics_A2_36_ChargedParticlesInCircularOrbits.ppt]] ||
 * **37** || **Generating Electricity : Electromagnetic Induction**
 * To understand how to generate electricity using electromagnetic induction
 * To be able to establish the relative direction of the field, motion & induced current by using the //“dynamo rule”// || [[file:Physics_A2_37_GeneratingElectricity.ppt]] ||
 * **38** || **Induction Laws**
 * To understand the direction of induced currents and their associated fields
 * To introduce the terms magnetic flux and magnetic flux linkage
 * To be able to calculate the size of the induced EMF for a given generator arrangement || [[file:Physics_A2_38_InductionLaws.ppt]] ||
 * **39** || **Catch Up Problems** || [[file:Physics_A2_39_CatchupProblems.ppt]]
 * **40** || **AC Generation**
 * To understand how we generate alternating current (A.C.)
 * To begin to appreciate some of the advantages of A.C. || [[file:Physics_A2_40_ACgeneration.ppt]] ||
 * **41** || **Back EMF**
 * To understand that a spinning motor is also a generator
 * To understand how electric motors behave when lightly or heavily loaded || [[file:Physics_A2_41_BackEMF.ppt]] ||
 * **42** || **Transformers**
 * To understand that transformers are all around us in everyday life
 * To understand the significance of A.C.
 * To be able to specify transformers using the “transformer rule”
 * To be able to complete efficiency calculations || [[file:Physics_A2_42_Transformers.ppt]] ||
 * **43** || **The National Grid** || [[file:Physics_A2_43_NationalGrid.ppt]] ||
 * || ** NOTE ADDITIONAL RESOURCES RELATED TO THE PRACTICAL EXAM CAN BE FOUND UNDER UNIT 3 ** ||  ||