## 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.

## Power

### Classwork

- We went through the questions on P41 and discussed counterweights on car park barriers.
- We made notes on power and did some examples.
- We agreed to do a test on energy on Weds 18th May.

## Bank Holiday

## 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.
- Add to your notes where necessary.

## 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

### Classwork

- I gave out the list of list of stuff you need to know for the test. We will do the test on Monday next week.
- We considered ways to measure the speed of sound in air.
- We made notes on wavefronts and rays. Here are the notes and diagrams from the lesson.
### Homework

- Revise for test next Monday. You may find these videos useful:
- This animation sort of shows what I wanted you to see in the lesson.
- Transverse and longitudinal animation and explanation with some examples too.
- Wave measurements (amplitude, wavelength, period, frequency) using this simulator.

## 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

- Read P100-101.
- Answer Q1-2 on P101.
- Hand in tomorrow AM before registration.

## Radiotherapy, radiation dose, reflection

### Classwork

- We went over your HW on radiotherapy.
- 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

- Answer Q1-4 on P79.
- 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

- Answer Q1-2 on P67.
- 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.
### Homework

- 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

- You asked each other (and answered) a series of questions about four circuits that you made up.
- 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.

## Test

### Classwork

- Do the test.
### Homework

- No homework.

## Newton.s Third Law

### Classwork

- Read through the sheet on Newton.s Third Law.
- Answer the questions on the sheet.
- Once you have finished, do some quiet revision for the test next lesson.
- Useful videos:
- https://www.youtube.com/watch?v=elkVPVWK4Fs
- https://www.youtube.com/watch?v=91QYouih4bQ

## Forces and braking

### Classwork

- You will be given the answers to the questions you did last lesson.
- Check your answers and try to correct any mistakes.
- When you have finished, answer the questions on P35 on terminal velocity and check your answers.
### Homework

- Revise for test next Wednesday.

## Forces and braking

### Classwork

- Read and make notes on P32-33 (.forces and braking.). You do not need to memorize the distances in Figure 2.
- Answer the questions on P.33.
- Answer Q1-2 on P38.
- Useful videos:
- https://www.youtube.com/watch?v=U_YAFpLBCnc
- https://www.youtube.com/watch?v=4yWA2Rk8wJM

## 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.