Edexcel A Level Maths - June 2022 - Mechanics

Edexcel A Level Maths - June 2022 - Mechanics

Contents:
00:00 - Intro
00:05 - Question 1
03:59 - Question 2
11:02 - Question 3
15:44 - Question 4
23:17 - Question 5

[cellmembrane_]

Hello, I would like to ask one question for question 3 part a),
why can the (1/4)t be ignored when setting the two vectors as parallel to compare i and j components?
Thank you for the video!

[ufcpresenter]

27:44 is the only thing I was stuck on and there is no explanation. Nice

[MadeleineSpraigue]

In 5a, why would you not just use 120=t*ucosx to rearrange for t? Would that not work instead of factorising the other one?

[yolandaonyenze]

For 5a, I tried setting t=120/Ucosα from the horizontal motion. In the vertical motion, you know s=0, u=Usinα, v=0, a= -g and t =120/Ucosα, so I tried using v = u + at. I got U^2 cosαsinα = 2(588). Why doesn't it work?

[revcs]

hi, at 12:49 i dont really understand why the velocity vector will be parallel to that other vector? wouldn't the displacement vector be parallel to it or something

[Willicle]

4c doesn't make any sense, why can you do Tcos0 to get it vertically? If you do 2mgcos0 you get R which is parallel that of the string, yet it seems to work backwards? It would only work if T was the hypotenuse. How do we know that?

[muhammadayaanadnan]

For question 4, why is it that there is no normal reaction for the weight of the beam (mg) and weight of C of 2mg?

[EbenezerIjidakinro]

which note taking app on your ipad did you use for this?