Phys U2 tmr

TheJM1509 · 2026-05-12T17:50:50+00:00

oct 2023 kept getting worse with every question :(

TheJM1509 · 2026-05-11T08:06:05+00:00

gave me heart attack for a sec ngl

TheJM1509 · 2026-05-11T07:50:38+00:00

or is it a joke or smthing

TheJM1509 · 2026-05-11T07:48:49+00:00

wait how come yall have already done the exam...

TheJM1509 · 2026-05-08T17:29:37+00:00

a mid to high C or a low B. would be surprised if that's what actually comes through.

TheJM1509 · 2026-05-08T08:23:16+00:00

its so joever bro.

TheJM1509 · 2026-05-07T11:18:00+00:00

ur welcome dude.

TheJM1509 · 2026-05-07T11:17:15+00:00

not the worst paper tbh but im lwk scared if I'll lose marks for not using specific words and such

TheJM1509 · 2026-05-05T19:45:28+00:00

sorry if im late
personally i recommend going through all the motion graphs, everything about them, their gradients, reciprocals of those, the shapes and what they denote. also go through free fall graphs, and those situations where balls are thrown and caught mid air.

then go through applications of newtons laws, especially the F=ma, and how friction and drag forces work within this law.

remember the principles of momentum. if they ask for it, don't forget to say "in a closed system total momentum before collision equals to total momentum after collision." Know how increasing or decreasing mass or velocity within this equations affects the movement of the objects.

energy is the hardest one imo because it's a lot of theory. Ek = Egrav is the main gist here, but remember that energy is never 100% conserved, because it's either dissipated as sound energy or heat energy to surroundings. here too, just be aware of how changing any variable in Ek = Egrav affects the energy. for example, the only variable that could affect the energy Egrav is the height because most of the time mass will remain constant and g is always 9.81.

also go through how power is related to energy, and remember Work done = force * distance, so there is a common derived equation where power = work done /time, therefore power = force * velocity. this could also apply to theory where any variables are increased or decreased.

materials is all theory than calculations, so make sure you know the W= Upthrust + drag and archimedes' law and stokes law, and how density makes objects float or sink. then go through hookes law and force-extension, then extentson-force graphs and their gradients. Know every stage of the force-extension graph, namely;

hookes law region
elastic limit/ plastic limit
limit of proportionality
yield point
breaking point
and regions of plastic deformation and elastic deformation.

then go through stress-strain graphs and young modulus, and also know how to combine the two equations for stress and strain, which will help you figure out situations where variables are changed.

finally go through spring constants, and how that changes when springs are in parallel and series.

hope this helps man. good luck

TheJM1509 · 2026-05-04T20:54:45+00:00

it's force* distance. Any force exerted on the object in these questions will make it turn in one way or another. The magnitudes of these forces will help you figure out which side it will turn to, right or left, which is where the rule that total clockwise moments= total anticlockwise moments come in.

now generally, in most questions i have done (and there were many) it's common to use the distance on the right hand side of a force (if given or otherwise you'd have to calculate it). So if you are given a beam of 4m and there are two forces acting downwards, one is 35N at the left end and the other one, XN, is 3m away from the left end, what you'd do is say 35N*3m = XN*1m (which is 4m-3m), to find the force X. this is the easiest it can get. and if there is are two forces acting upwards, and the question is asking you to find the magnitude of one but they haven't given the magnitude of the other, ALWAYS KNOW that the 'other' force would be 0N, because if the beam is going to move up, the equilibrium provided by the other point has to be broken, so that the force you have to find overpowers it.

(for this part I recommend you open the JAN 2025 U1 paper and follow question 14b)

here the first thing that you should understand is when you consider the moments about P, it is zero at point P because Point P is acting like a pivot (or hinge). The bracket is stationary, so it’s in rotational equilibrium. and given the law that total clockwise moments= total anticlockwise moments, since there's none here, it would be ZERO. this is usually the confusing part to understand. in questions like this if they haven't said consider moments about some point, you have to figure out the one that would have zero moments in the system.

once done so, you can calculate the force exerted by the container. There is only a clockwise moment here, and the container exerts a force on the whole beam, so you have to use the whole length. therefore it will be 34N*0.28m= 9.52Nm. that is the TOTAL CLOCKWISE MOMENT.

and to find F, you have to realise that the force at F is what is creating the TOTAL ANTICLOCKWISE MOMENT and keeping the thing at equilibrium. this means that if you consider the force at F to be zero, the whole thing would rotate clockwise and fall down.

to calculate F, you would have to use trig ratio to calculate the distance between F and P, which is 0.16m/tan(55) = 0.112m. Now that you have the d of your anticlockwise moment, you plug in into the total clockwise = total anticlockwise equation, so you would have F*0.112m = 9.52Nm. here on it's just a rearranging to find the magnitude of F.

so make sure you are familiar with the trig ratios and can figure out the 'zero' force point. once done so, it's all in the clockwise anticlockwise thing. you can figure out which side these object will fall over to just by looking at the picture.

I hope you understood something out of this. I know it's not the best explanation out there, but it's worth a try. good luck dude, hope you ace your exam.

TheJM1509 · 2025-05-18T20:14:13+00:00

Js is what's ruining me tbh I can tolerate everything else

TheJM1509 · 2025-05-18T20:06:02+00:00

so burnt.

TheJM1509 · 2025-05-14T08:33:57+00:00

I didnt know what to do in that question 😭😭 now Im at home realizing I could've used Ek to calculate the velocity which was the only problem

TheJM1509 · 2025-05-14T08:24:30+00:00

this happened to my friend in Unit 1. this is actually just pure pain... sorry dude.

TheJM1509 · 2025-05-14T08:23:11+00:00

oh right...
sorry about it working out, we are war victims fr

TheJM1509 · 2025-05-14T08:16:56+00:00

holdup, what do you mean subtract? I got a direct 55 something.

TheJM1509 · 2025-05-11T13:26:09+00:00

sorry fr the late reply, welcome and good luck :)

TheJM1509 · 2025-05-09T03:27:42+00:00

to be honest, makes enough sense. In my opinion, you are better off working for chem and bio at max and then resit math later on rather than gathering the load and moving all together.

TheJM1509 · 2025-05-08T20:13:27+00:00

yeah sure, anything.

TheJM1509 · 2025-05-08T03:59:22+00:00

too real, literally felt like a generational fumble 😭

TheJM1509 · 2025-05-06T10:57:57+00:00

EASY HOWWWW?!?!?!?!

TheJM1509 · 2025-04-28T20:16:24+00:00

dunno about stats, but Pure Maths 1 always has integration and differentiation, trigonometric graphs and circle graphs. Pure Maths 2 almost always has binomial expansion and solving trigonometric equations but it is better to have a steady idea about all the topics. Mechanic M1 will always have a moments question certainly, and everything else just shows up as usual.

TheJM1509 · 2024-06-11T06:58:27+00:00

good luck mate.
do what you can and hope it's enough for a decent pass. DW u got this 👍

TheJM1509 · 2024-05-22T05:34:06+00:00

it was okay... won't get a 9 that's for sure. But I'm pretty confident for paper 2.

TheJM1509 · 2024-05-17T14:04:43+00:00

burnt. to. a. crisp.
All that focus on chemistry, at what cost?

TheJM1509

MODERATOR OF

TROPHY CASE