# GCSE Physics 9.3

• ## Static Electricity

• ### Classwork

• We looked in more detail at static electricity with a few demonstrations.
• We did a kahoot quiz on static electricity.
• ## Going through exam

• ### Classwork

• We went over the end of year exam.
• I demonstrated this toy and we started to look at quite a lot of the physics involved in making the metallic coated plast\$
• We started to make notes on static electricity.
• The stuff we will be learning in this topic can be found here and here.
• ## Efficiency

• ### Classwork

• You did a long question about a crane that recapped on ideas about work and power and led onto ideas about efficiency.
• We went over the two formulae for efficiency and showed that they are equivalent.
• We looked at a few electrical appliances and tried to identify useful energy output and wasted output.
• ## Spring Energy

• ### Classwork

• We made notes on the formula for spring energy, then did quite a few tricky calculations.
• We looked at situations where a spring fires an object (or the spring itself) and calculated the speed it is fired at and the height it might reach.
• We then did this for a real spring, and it almost reached the predicted height (although not quite due to friction and air resistance).
• Next lesson we need to do energy efficiency, then we are pretty much finished with this topic.
• ## Springs

• ### Classwork

• Someone had a VR headset. I took two pictures of a kettle from two positions. Have a look at this image on your phone - put your hand veritcally between your eyes and stare at it close up and you might see the kettle in 3D. Hold the phone sideways about 20cm from your face, and tru to look 'through' the phone screen.
• We made notes on springs and their uses.
• Much more on this next lesson.
• ## Power work and energy - more questions

• ### Classwork

• You did these questions and we went through them.
• We agreed to do an end of topic test on Thursday 19th May.
• You already have the list of stuff you need to know for this topic.
• ## Power

• ### Classwork

• We made notes on power and did some examples.
• We discussed the fact that in the tyre pulling problem the force and the distance moved are probably not in the same direction, and some of you worked out how to use trigonometry to sort this out, however this is not on the syllabus. You will do it if you do A Level physics.
• We looked at how to approach problems when you can't find a single formula that works.
• We derived the formula:
power = force x speed
which can be useful.
• ## Work and energy - example questions

• ### Classwork

• We went through several examples of work and energy questions - some written by me and also Q3 on P41.
• ### Homework

• Answer Q2 and Q6 on P48.
• Check your answers using this video and bring any questions you have to next lesson.
• ## Work Done

• ### Classwork

• We went over the formula for work done, then did a series of example calculations.
• We also tried to identify the energy transfers in these examples.
• ## Rollercoasters

• ### Classwork

• I gave out the list of stuff you need to know for this topic.
• We did a couple of questions from the textbook.
• I demonstrated the principle of how most rollercoasters work using a marble track like this.
• We worked thourgh this sheet together, and went through the first side.
• We still need to go over the calculations on the other side.
• ### Homework

• Make notes on 'work done' using P40-41 and the first half of this video - stop when he starts talking about asteroids.
• Bring your notes to next lesson, when we will do some examples.
• ## GPE

• ### Classwork

• We went over the HW by projecting peoples' answers on the board.
• We made notes on GPE and did an example calculation.
• ## Kinetic Energy

• ### Classwork

• We did some recap on energy, then looked at kinetic energy in more detail.
• You made notes on the formula for kinetic energy, and we did several examples of increasing difficulty.
• ### Homework

• Answer Q1-2 on P47 and bring to next lesson. NOTE: we haven't done GPE yet - the answer to 2 b) i) is 98J.
• ## Test

• ### Classwork

• You did the test.

• No homework.
• ## Topic Recap

• ### Classwork

• You did some past paper questions which we then marked using the markscheme.
• We played a game of splat.
• ## More Refraction

• ### Classwork

• We went through the HW together and corrected people's diagrams for the triangular prism.
• You then did a quicl practical to see the dispersion of white light through a triangular prism.
• You did a practical to investigate refraction in a semicircular block.
• You started to plot a graph of angle of refraction against angle of incidence.
• ## Reflection and refraction

• ### Classwork

• You did an experiment to plot the path of a ray reflected from a plane mirror.
• You then plotted the path of a ray as it refracted through a perspex block.
• We made notes on reflection and refraction.
• ### Homework

• Bring to tomorrow's lesson.

• ### Classwork

• You made notes on ratiation dose and the sievert. I showed you this chart of radiation exposure.
• We made notes on sterilization and the advantages of gamma rays and x-rays.
• ## EM Spectrum Dangers

• ### Classwork

• We played waves bingo.
• You made notes on the dangers of different parts of the EM spectrum.
• You made notes on ionizing radiation, and which parts of the EM spectrum are ionizing.
• We looked in a bit of detail at how x-rays are used to image broken bones, using this video.
• We also made notes on CT scans.
• I told you that we will be doing a test on waves in the last week of this term.
• ### Homework

• Make notes on radiotherapy using P85 and this video.
• You need to explain how using lots of weak beams of radiation minimizes the damage to healthy tissue surrounding the tumour.
• Note that x-rays and gamma rays can both be used for radiotherapy.
• Bring your notes to next lesson.
• ## Electromagnetic Spectrum

• ### Classwork

• We went over the HW you did, and expended on the similarities and differences between parts of the electromagnetic spectrum.
• ## Waves calculations

• ### Classwork

• We went through the waves calculations in detail.
• I demonstrated superposition of sound waves, and we went out to the field to experience this more clearly.
• ### Homework

• Find out the parts of the 'electromagnetic spectrum' in order, and one use for each part.
• Bring your notes to next lesson.
• ## Transverse and longitudinal waves

• ### Classwork

• I demonstrated transverse and longitudinal waves with the aid of a slinky and a rope, and we did some analysis with the slow motion camera.
• You made notes on transverse and longitudinal waves, and answered the questions on P67, which we went through together.
• ### Homework

• Watch this video and use the box on P53 to make notes on period and frequency.
• Bring your notes to next lesson.
• ## Waves Questions

• ### Classwork

• I went over the diagram from your notes to ensure you had drawn and labelled it accurately.
• You answered the questions on P69 and we went through these, using a slow motion camera to analyse waves on a rope.
• ## Waves

• ### Classwork

• Will fil out soon...
• ### Homework

• Make notes on P68-69 - this video from 1:55 onwards will help.
• Bring notes to next lesson.
• Optionally watch this video.
• ## Electricity Test

• ### Classwork

• We did the test

• No homework.
• ## Diode & LDR

• ### Classwork

• We made notes on the diode & LED.
• We made notes on LDRs and considered apllications for them.
• ## V-I Curve for Bulb

• ### Classwork

• You built a circuit, collected data and plotted a V-I curve for a bulb.
• We analysed the curve, and discussed how and why the resistance of the bulb changes at higher currents.
• ### Homework

• Revise for a test on electricity on Thursday 21st January.
• Here is the list of stuff you need to know.
• ## Voltage-Current Characteristic Curves

• ### Classwork

• I demonstrated an experiment to plot a V-I graph for a resistor. We will analyse this graph next lesson, and you will then plot characteristic curves for some other components.
• ## We will have a test on electricity on Thursday 21st January.

• ### Classwork

• I gave you a tough circuits question to think about.
• We went through all the questions on the HW sheet from last lesson.
• ## Circuit Rules

• ### Classwork

• I gave out the list of stuff you need to know for this topic.
• You made notes on the rules for current, voltage and resistance in series and parallel circuits.
• You started these circuits questions.
• You modelled these circuits using this circuit simulator.
• ### Homework

• Please finish the worksheet you started in class and bring to next lesson.
• Make sure you are able to explain how you arrived at each of the answers.
• ## Ohm's Law

• ### Classwork

• We watched the video that I meant to post for HW yesterday.
• You made notes on Ohm's Law, and I built some circuits for us to practise some calculations.
• We then started to look at the rules for voltage in series circuits, but didn't write this down - we will continue with it next lesson.
• ## Current in circuits

• ### Classwork

• We made some notes on current in series and parallel circuits.
• You did an experiment to investigate this.
• ### Homework

• Sorry - somehow I didn't save this so the homework was not visible to you.
• So no homework :(
• ## Test feedback, electricity

• ### Classwork

• We went through the test
• We started to look at some simple circuits & think about current.

• Do the test.

• No homework.
• ## Forces and braking

• ### Classwork

• You will be given the answers to the questions you did last lesson.
• When you have finished, answer the questions on P35 on terminal velocity and check your answers.
• ### Homework

• Revise for test next Thursday.
• ## Scalars, vectors, Newton's third law.

• ### Classwork

• We made notes on scalars and vectors, and made a table with examples of scalar and vector quantities.
• We made notes on Newton's third law and looked at a few examples. This won't be in the test, but you do need to know it for your GCSE.
• ### Homework

• Revise for the test on Thursday 05-11-2015.
• ## Terminal velocity

• ### Classwork

• We went over terminal velocity, and annotated a speed-time graph for a parachutist.
• I demonstrated some ball bearings reaching terminal velocity in a cylinder of liquid, which we analysed using the slow motion camera.
• I gave out the list of stuff you need to know for this topic.
• NOTE: the test will NOT cover Forces and Braking, or the first item in Resultant Forces (about equal and opposite forces).
• ## Investigating Newton's Second Law

• ### Classwork

• You worked through this sheet on Newton's First and Second laws and we went through the answers together.
• You did this practical to investigate Newton's Second Law.
• A few people need to finish off their graphs - we will do this at the start of next lesson and discuss what you found.
• ### Homework

• Watch this video from 3:05 onwards and use P34-5 to make notes on Terminal Velocity.
• Bring your notes to next lesson.
• ## Newton's Second Law

• ### Classwork

• We went over Newton's First Law, which you made notes on for HW.
• We pretty much worked out intuitively what Newton's Second Law would be.
• We did some simple calculations using F = ma for a man and a boy pushing a trolley and a car.
• ## Question practice

• ### Classwork

• We worked through Q6 on P10 and Q1-2 on P11 - this took quite a while but you did well at it.
• A few people tried to draw a displacement-time graph for a bouncing ball, which we then checked with some motion tracking software.
• ### Homework

• Make notes on Newton's First Law using this video and P14 of the textbook.
• Bring your notes to next lesson.
• ## Graphs and formulae

• ### Classwork

• We wemt through the HW in detail - it was quite tricky.
• We learned a new formula for acceleration:
a = (v-u)/t
• We practised a few examples of using the formula, and compared it to finding the acceleration from a graph.
• ## Tangents, ticker timers

• ### Classwork

• We worked through this sheet and learned how to calculate the gradient of a curve at a point using a tangent.
• We used ticker timers to investigate the acceleration of a falling lump of plasticine.
• ### Homework

• Answer Q2-4 on P10 and hand in tomorrow morning before registration.
• For Q3 you can draw a tangent *very lightly* on the book in pencil, then rub it off afterwards.
• ## Speed-time Graphs

• ### Classwork

• We went over the material you covered for HW.
• We worked through this sheet on speed-time graphs.
• ## Speed-time graphs and velocity-time graphs

• ### Classwork

• We worked through Q1&2 of this sheet.
• Speed-time graphs and velocity-time graphs are new, so we acted out a few more examples.
• We then made notes on what the area under a speed-time graph and a velocity-time graph represent.
• ### Homework

• Watch this video from 7:01 to 9:15 - this shows how to calculate the area under a more complicated speed-time graph. Add to your notes from the lesson.
• The gradient of speed-time and velocity-time graphs gives you the acceleration in m/s².
• Watch the same video from 1:50 to 5:15 and make notes on this.
• We will do examples of these next lesson.
• ## Displacement and Velocity

• ### Classwork

• We went through the HW.
• We looked at a displacement-time graph and calculated the gradient.
• We made some brief notes on displacement and velocity, and contrasted them with distance and speed.
• ## Distance-time graphs and displacement-time graphs

• ### Classwork

• We made some notes on distance time graphs.
• We calculated the gradient at various points on a distance-time graph to find the speed.
• We also calculated the average speed of a jouney from a distance-time graph.
• We started to make notes on displacement-time grahps, and how they differ from distance-time graphs.
• ### Homework

• Complete both sides of this worksheet and bring to tomorrow's lesson.
• ## Distance-time graphs

• ### Classwork

• We went through basic expectations and when homework will be set, etc.
• I gave out folders and textbooks.
• We acted out some basic distance-time graphs and considered what the gradient of the line represents, but we didn't make any notes.