Search results

  1. J

    Very hard mechanics question

    I just dont know where to start for even part i. Could you give me some advice please?
  2. J

    Very hard mechanics question

    I am unsure as to where to start with this question. It is the final question of a 2020 trial paper my friend gave me. Any advice would be appreciated thanks!
  3. J

    Projectile motion question

    Hi all! Can someone explain to me how to do part ii and iii of the attached question please? Working would be greatly appreciated thanks!
  4. J

    Logistic Differential equation question

    Hi guys, I am having trouble doing part b of this question fro the Cambridge textbook. I need to answer and full work to that answer please. I have attached the question. Thanks!
  5. J

    Roots of Unity question

    ah ok thanks! i ended up just using algebra by that point and got the answer. appreciate the help!
  6. J

    Roots of Unity question

    sorry i made a typo it should be π/5 not π5. thanks for the help on the substitution part though, that was really useful!
  7. J

    Mechanics question from Cambridge 4u textbook

    ok i was no aware of the v^2 formula. will attempt using this method. thanks for the help man!
  8. J

    Roots of Unity question

    Sup lads i'm back, I've worked out most of this question except for part iii of b and part c. I wrote out the whole question just for context. If anyone could give me advice on how to do part iii of b and part c it would be appreciated! a. (i) Find the five fifth roots of unity, writing the...
  9. J

    3D Vector proof

    Ah that makes a lot of sense. Thanks for the help man appreciated
  10. J

    3D Vector proof

    Hello friends, I am having trouble with part d of this question, any help would be appreciated! 8. The cube OABCDEFG has vertices O(0, 0, 0), A(a, 0, 0), B(a, a, 0), C(0, a, 0), D(0, a, a), E(0, 0, a), F(a, 0, a) and G(a, a, a), where a > 0. (a) Use a scalar product to find the angle between...
  11. J

    Mechanics question from Cambridge 4u textbook

    I don't know where to start with this question, any pointers would be greatly appreciated. A particle is oscillating on the x-axis about the origin. It passes through the point A, where x = 0·01 metres, with speed 0·09 m/s and it passes through the point B, where x = −0·02 metres, with speed...
  12. J

    General magnetic field question

    I was under the impression that spin was a property of the charge? As in it is a fundamental part of a particle, meaning that regardless of movement or not, a particle will always have spin and thus always have a magnetic field. That is my impression of it at least.
  13. J

    General magnetic field question

    Why do static charges not experience a force by magnetic fields? I thought that spin produced a magnetic field for every charge, but the textbook that I am using for questions states that static charges don't experience a force from a magnetic field. Is there some information I am lacking?
  14. J

    Mechanics question

    Ok, I'll invest more time into the cambridge textbook then. Thanks again for the help everyone!
  15. J

    Mechanics question

    Yep, we are correct for parts a to d! I think the book is wrong, I don't know where they got those answers from. I thought i was missing something from my working and went over it again and again when i couldn't get the answers at the back of the book its relieving that other people are also not...
  16. J

    Mechanics question

    I completely agree with you, I also do physics and the question just doesn't make sense. This was taken from my math in focus ext 2 book, if you are saying this is 3 unit stuff would you recommend using the Cambridge ext 2 book instead?
  17. J

    Mechanics question

    Hello everyone, thanks for taking the time to answer my question! According to the answers to this question, the answer to part e should be 179.8m and part f should be t = 2s, 10s. So I'm wondering if the answers are wrong? I completely agree with the working you guys have here.
  18. J

    Mechanics question

    Hello this is my first post here :) I am having trouble with part e and f of this question. help me pls haha A rocket is fired vertically from the ground with an initial velocity of 60ms^-1. It is subject to a force that gives it a constant acceleration of -10ms^-2. After t seconds it is x m...
Top