# GCSE Physics 9.1

• ## More static charge

• ### Classwork

• I showed you the light bulb that I ran really hot last lesson. The inside of the glass bulb was coated in a thin layer of tungsten metal which was shiny, especially when I broke the bulb and we looked at the inside of it.
• I demonstrated a few more things with levitating bits of aluminized plastic, and we added to our notes.
• ### Homework

• Research one danger of sparks arising from static electricity.
• Max 1 side A4. Due Friday morning.
• ## 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 plastic and also how it levitates.
• We started to make notes on static electricity.
• The stuff we will be learning in this topic can be found here and here.
• ## Circuits revision

• ### Classwork

• We did a kahoot quiz that had a few extra bits that you don't need to know about (but they are interesting).
• You did some past paper questions - we went through about half of them and the answers are at the end of this pdf if you want to check the rest.
• I've removed Q4c) as you haven't learned about that yet.
• ## 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.
• We discussed 'wasted' energy again.
• We played MFL articulate.
• REMINDER: no test for this topic now - we will just work through some questions in class.
• ## 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.
• ## Power, Springs

• ### Classwork

• I gave out the revision list for the end of year examination.
• We finished off the questions from last lesson found here.
• We derived the formula:
power = force x speed
which can be useful.
• We tried to observe the transit of Mercury using a pinhole. See this demonstration which shows a pinhole being used to observe an eclipse. The greater the distance between the hole and the screen, the bigger the image of the sun will appear.
• We made notes on springs and their uses, and calculated the spring constant of two different springs.

• ## Work and energy - examples

• ### Classwork

• We made notes on "work done" (for those who missed the lesson) and did an example calculation for dragging a box across a desk.
• We discussed and made notes on the energy that is 'wasted' as heat by friction in most systems.
• We also discussed 'heat engines' which are not on they syllabus, but are interesting. For theory on heat engines watch this and for examples see Hero's Engine and the Stirling Engine.
• ### Homework

• If you missed the cover lesson, please read P40-41 and answer the quetions on P41. Bring to next lesson.
• Then next lesson we can go through these and everyone should be in the same place.
• ## Cover Lesson

• ### Classwork

• You marked and went over the sheet on rollercoasters.
• You made notes on "work done" and answered the questions on P41.
• ### Homework

• Watch the first half of this video - stop when he starts talking about asteroids.
• ## Rollercoasters

• ### Classwork

• We went through the waves test and discussed ways of checking whether two things are proportional to each other.
• I gave out the list of stuff you need to know for this topic.
• I demonstrated the principle of how most rollercoasters work using a marble track like this.
• You started this sheet.
• ### Homework

• Finish both sides of the rollercoaster sheet and hand in tomorrow morning before registration.
• ## GPE

• ### Classwork

• You did some estimation questions about kinetic energy.
• We went over the HW by putting people's answers on the board.
• We made notes on GPE and did some example calculations.
• We also started to look at transfers from GPE to KE (e.g. when an oject is dropped).
• You started to answer Q1 on P45. We will finish these questions next lesson.
• ## 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 a quick example calculation.
• ### 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.
• You may find this video useful, and it links to some worked examples.
• ## Wavefronts and rays

• ### Classwork

• We went over the HW and corrected your diagrams.
• You did an experiment with a triangular prism, and we made notes on dispersion.
• You made notes on wavefronts and rays - more on this next lesson.
• ## Refraction

• ### Classwork

• You predicted and then plotted the path of a ray as it refracted through a perspex block.
• We made notes on refraction.
• ### Homework

• Hand in tomorrow AM before registration.

• ### Classwork

• You made notes on ratiation dose and the sievert. I showed you this chart of radiation exposure.
• You did an experiment to investigate the reflection of light at a plane mirror.
• ## CT Scans

• ### Classwork

• We played spot the difference.
• I showed you this video and we made notes on CT scans.
• We made brief notes on sterilization (see P85) and why gamma rays and x-rays are a good choice due to their penetrating ability.
• ### 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.
• ## 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.
• I told you that we will be doing a test on waves in the last week of this term.
• ## Electromagnetic Spectrum

• ### Classwork

• I showed you this video about the electromagnetic spectrum.
• You did some research on the electromagnetic spectrum:
• What is the electrmagnetic spectrum?
• What are the parts of the electromagnetic spectum in order?
• Find three uses for each part of the parts of the elecrtomagnetic spectrum.
• Find five similarities and five differences between different parts of the E-M spectrum.
• ### Homework

• Hand in tomorrow morning before registration.
• ## Waves calculations

• ### Classwork

• We went over the questions you did for HW.
• I noted the importance of laying your work out clearly, and showing units in your working.
• I demonstrated laser light diffracting through a narrow slit, and we discussed the focussing of water ripples, light, sound and radio waves using curved reflectors.
• Here is a sound reflector and a light/infra-red reflector (DON'T TRY THIS AT HOME) and a radio wave reflector.
• ## Waves calculations

• ### Classwork

• We looked at wave calculations and did some calculations for the waves in the ripple tank.
• ### Homework

• Answer Q1-7 on the sheet I gave out.
• Due before 9:00am on Friday.
• ## Wave properties

• ### Classwork

• We went over the notes that you started to make on P68-9 and continued these.
• We covered wave properties, the relationship between period and frequency, and the relationship between speed, frequency and wavelength.
• We did quite a few examples, then you started the questions on P69. We will finish these next lesson.
• ## Waves

• ### Classwork

• I did a number of demonstartions of wave phenomena using the ripple tank.
• I demonstrated transverse and longitudinal waves using a slinky and aslow motion camera, and we made notes on them.
• ### Homework

• Hand in tomorrow morning before 9:00am.
• ## Test & Waves

• ### Classwork

• We went over your test. If you want a blank copy for corrections then collect one from me next lesson.
• If there are any questions/areas you are still struggling with, come and find me.
• I introduced the new topic - waves. I demonstrated a number of wave phenomena using a ripple tank.
• You started to make notes on wave properties using P68-9 - we will continue this next lesson.
• ## Test

• ### Classwork

• We did the test on electricity.

• No homework.
• ## Diodes, LEDs, recap

• ### Classwork

• We finished our notes on diodes, and I demonstrated an LED as well.
• We made notes on the reason why the resistance of a light bulb filament increases with temperature.
• We did some recap on a few things to prepare for the test on Thursday.
• ## V-I Curve for Bulb

• ### Classwork

• You plotted a graph of your results, and also calculated the resistance at different currents.
• We analysed the curve, and discussed how and why the resistance of the bulb changes at higher currents.
• I demonstrated the V-I curve for a diode - we will make notes on this next lesson.
• ### Homework

• Revise for a test on electricity on Wednesday 20th 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, and we analysed the graph.
• You collected results to plot a V-I graph for a bulb, and started to plot the graph.
• ## Thermistors

• ### Classwork

• You made notes on thermistors.
• You did an experiment to create a calibration curve for a thermistor.
• Some of you extrapolated to predict the resistance at 100°C.
• ## Current, charge and time

• ### Classwork

• I gave out the list of stuff you need to know for this topic.
• You tried to calculate the current in a tricky parallel circuit.
• You made notes on the relationship between charge, current and time, and did some example calculations.
• ### Homework

• No homework :(
• ## Circuit calculations & simulations

• ### Classwork

• We went over a couple of questions from the HW (but not all).
• You found the voltage and current at different points in these circuits.
• Then you built the circuits using this simulator to check your answers.
• ## Solving problems

• ### Classwork

• We used the circuit rules we have come up with so far to answer a few challenging questions.
• ### Homework

• Answer these questions and hand in tomorrow morning before registration.
• If you haven't finished after spending 30 minutes on them, then stop and just hand in what you have done.
• ## Investigating current

• ### Classwork

• You did an experiment to investigate current in series and parallel circuits, and verified the rules we learned last lesson.
• You investigated voltage in series and parallel circuits, and we started to work out the rules for voltage.
• ## Resistance and Voltage

• ### Classwork

• We did a few quick recap questions on current in parallel circuits.
• We made brief notes on resistance, voltage, and Ohm's Law.
• ### Homework

• Answer the questions on P167 (leave out 3b).
• Hand in tomorrow morning before registration.
• ## Current

• ### Classwork

• We went through the test. If any issues remain, please come and find me and I will explain.
• We made a note of some circuit symbols you need to know.
• You predicted how bright some bulbs would be in different circuits, and we tested this.
• We made some notes on current in series and parallel circuits using this circuit simulator to help visualise.

• 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 Wednesday.
• ## Scalars & vectors

• ### Classwork

• We made notes on scalars and vectors, and made a table with examples of scalar and vector quantities.
• ### Homework

• Revise for the test in the first week back after half term.
• ## Terminal velocity

• ### Classwork

• We went over terminal velocity, and annotated a speed-time graph for a parachutist.
• We also looked at terminal velocity in the context of a car (or scooter) reaching its top speed.
• You worked through Q1 and Q3 on P35.
• I demonstrated a ball bearing reaching terminal velocity in a cylinder of liquid, which we will analyse next lesson 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

• We went through the last two questions from the sheet from last lesson.
• 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.
• You answered the questions on this sheet and we went through everything up to Q6 on NII.
• ## More tangents

• ### Classwork

• We did this sheet. The ideal answers were: 2a) 0.8m/s, 2b) 2.2m/s, 4a) -3m/s², 4b) -18.75m/s², 5) 6075m
• We went through Q1 on P11 together (the one about the oil drops).
• ### 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, then did Q6 on P10 and Q1-2 on P11. I also gave out this sheet which we can do at the start of next lesson.
• Remind me to go through Q1-2 on P111 next lesson.
• ## Tangents, terminal velocity

• ### Classwork

• We finished off this sheet and learned how to calculate the gradient of a curve at a point using a tangent.
• We discussed what would happen if an object fell from a great height, then used a slow motion camera to investigate a paper shape falling.
• We will make notes on terminal velocity next lesson.
• ### 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.
• ## Ticker Timers

• ### Classwork

• We plotted a distance-time graph and the class gave feedback on one graph.
• We will complete that sheet next lesson when we learn about finding the gradient of a curve.
• We did an experiment with ticker timers, and investigated a falling ball of plasticine.
• We will find out what happens if it's dropped from higher up next lesson...
• ## Speed-time graphs and velocity-time graphs

• ### Classwork

• We worked through Q1&2 of this sheet.
• We then started to make notes on what the area under a speed-time graph represents.
• ### 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 that we started in the lesson.
• The gradient of a speed-time graph 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.
• ## Velocity, speed-time graphs

• ### Classwork

• We quickly went over the HW.
• We made some notes on displacement and velocity.
• We started to interpret speed-time graphs, and translate between distance-time graphs and speed-time graphs.
• We will do more on this next lesson.
• ## Displacement-time graphs

• ### Classwork

• We 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.
• We acted out a few displacement-time graphs, and saw that the gradient of a displacement-time graph can be positive or negative.
• ### Homework

• Complete both sides of this worksheet and hand in tomorrow morning before registration.
• ## Distance-Time Graphs

• ### Classwork

• We went through some basic expectations.
• We acted out some distance-time graphs, and made notes on the features of distance-time graphs.
• We practised calculating the gradient of parts of distance-time graphs to calcuate speed.
• We looked at a few things that are not allowed on distance-time graphs because they are impossible.