r/AlevelPhysics

I am off by 4 marks for an A* in 9702 Alevel Physics. Can someone please review my answer and let me know that whether or not should i go for a recheck, Thanks.

Muje physics thoda above mains level laga, chem was doable, maths was scoring... Y'all thoughts?

Should I give this coaching papers or should I switch to other like allen smth...

Hi everyone (teacher here), I know you guys have your results coming soon. Whatever result you receive, please know that you are not defined by this result. You will always have more opportunities in life to show your potential. My hopes and prayers are with you.

Feel free to reach out to me whatever the outcome. And in case the result is not what you expected, I’ll try my best to guide you.

https://youtu.be/0gKNOCHHsy4?si=7Fz6f4Xoh0NjTNAi

Please don’t see this as self-promotion. Some students reached out to me last year after their results, so I decided to share this with you guys because I know how tough this time can be and how lost or stuck you might feel if your results are not up to your expectations.

I am off by 4 marks for an A* in 9702 Alevel Physics. Can someone please review my answer and let me know that whether or not should i go for a recheck, Thanks

Figure 4 is the Sankey diagram in the top right

I got everything right except for 4 a). Somehow I also got everything on the next page right too first time but not this 4 a). Why does the KE not changing mean it's not included in the diagram? Is the implication that the others are changing? Why would they be if KE is constant?

My guess is that it's because Chemical Energy from the fuel isn't constant but I don't know why it would or wouldn't be. What are everyone's thoughts? Ty

For question c, I know I should lose a mark for saying measuring balance, but is there any chance i get the mark. I'm one of the mark for the next grade.

Hi All,

I have just finished making this Advanced Physics Calculations tool to generate calculations with worked and explained solutions for all equations in IB Physics (HL and SL). The purpose of the tool is to help students build fluency by generating problems that they can practice until they feel confident. The tool is not intended to replace exam question practice, you should definitely still do lots of this!

The tool generates four kinds of problems:

• Equation - Questions that test application of a single equation (including rearrangments)
• Problem - Questions requiring you to work across multiple equations. -
• Graph - Generartes a graph and requires interpretation and then application to an equation.
• Derivation - algebraic derivation of expressions for various quantities.

Key features include:

• Scarecrow Explains mode - briefly takes you through the underlying physics.
• Worksheet generator - quickly produce worksheets including answer keys.
• Random mode - randomly generates questions based on topics you have selected, greate for revision and selecting equations.

I have tried to keep it user-friendly, but click 'Instructions' if anything is not obvious.

I hope you find it useful, feedback welcomed.

Full disclosure: The tool was made using AI-coding tools, because I am a teacher not a coder. It is 100% free, no subscription, no ads, I am not trying to make money, just trying to be useful.

P.S. I am working on a chemistry one, but by the nature of chemistry it is rather more complex (sorry physicists, no slight intended!) so it will take a while longer to complete.

I’ve gotten everything right except for b) iii). Why did they calculate the horizontal component - 54cos(35) - of the tension in the wire? And why did they add it when it’s acting parallel to point a? The only forces I’d imagine would be relevant to use for the moments here are the vertical component of the tension in the wire and the weight which are both perpendicular (rather than parallel) to the line from A -> bottom right corner of the sign. The following question - iv) doesn’t make sense to me for the same reason.

For b ii) I just did 54sin(35) x 0.68m = W x 0.34m. I just don’t get why it’s wrong

Thinking about it some more, is the 54cos(35) factored in because the sign is in equilibrium? There is a horizontal component to the tension after all but if they’re asking us to take a moment from point A I still don’t know why we’d use a force parallel to it to do that. Hopefully someone here can see the error of my ways. Ty🙏🏽

Hey everyone, I hope you're all doing well.

I recently requested my scripts back and found paper 3 marking to be very suspicious especially for the last 6 marker as seen below(in text as well as screenshot due to illegible handwriting).

Handwriting is horrendous because I was very ill on the day so timing was a huge issue so I had to rush this question.

This is not only me but many of my friends and others online have also achieved 0/6, it seems like something is wrong could someone please let me know what they think.

Question:

The student placed the ball bearing onto the surface of the honey and released it. She used a stopwatch to determine the time t for the ball bearing to fall between the two rubber bands. She repeated this measurement and calculated a mean time.

The student calculated the velocity v of the ball bearing using v = x/t

Explain how the student could modify her procedure to obtain an accurate value for the terminal velocity. (6)

Answer (as written, including crossed-out text struck through):

Use a mobile phone camera to record the footage of ball bearing falling into honey. Play it back take measurements such as time taken for ball bearing to to pass from one top rubber band to bottom rubber band. This will make make it easier for to distinguish determine when ball bearing passes each rubber band. Use a tong or a other appropriate instrument to drop ball bearing from from top of the measuring cylinder, this ensures that ball bearing reaches terminal velocity by the time it reaches top rubber band. This reduces systematic effect of systematic error and increases accuracy. She could use light gates look at measuring ruler at eye level, and cylinder into prevent parallax errors. Use a set square set square to ensure measuring cylinder cylinder is vertical vertical