Recent content by ojsimon

  1. O

    Undergrad Understanding Trampoline Mechanics

    Ok sounds a bit to complex for me then, but thanks anyway.
  2. O

    Undergrad Understanding Trampoline Mechanics

    Doesn't the Earth recoil very very slightly?
  3. O

    Undergrad Understanding Trampoline Mechanics

    Hi I'm just trying to understand the mechanics of a trampoline, as i think it will better understand my understanding of mechanics as a whole. This is my model: We have some plastic fabric which we will assume is inelastic. A circular trampoline where we have 30 identical springs which are...
  4. O

    Why is the potential at P less than at Q if P is the positive terminal?

    Can no one answer this question?
  5. O

    Undergrad How do current, charge and voltage change during capacitor charging and discharging?

    Yeah thanks a lot that has clarified this point completely. Cheers
  6. O

    Undergrad How do current, charge and voltage change during capacitor charging and discharging?

    From your new sketches it looks like current increases when it is discharging, doesn't this contradict what was previously said. But thanks again for the sketches they make this point really clear. Thanks
  7. O

    Why is the potential at P less than at Q if P is the positive terminal?

    Hi Ok so i came across this question which asks you to find the force on electrons in a wire which is moving in a magnetic field, hence the opposite to the direction of the current. I worked out using The right hand rule that the current would be going from point P to Q, which was write...
  8. O

    Undergrad How do current, charge and voltage change during capacitor charging and discharging?

    Ok thanks everyone that has clarified my points i think...
  9. O

    Undergrad How do current, charge and voltage change during capacitor charging and discharging?

    Can no one answer this?
  10. O

    Undergrad How do current, charge and voltage change during capacitor charging and discharging?

    Ok so i am just trying to clarify a few points about capacitor charge, discharge, i was wondering if anyone could help. 1)In charging, am i right in thinking current decreases exponentially, charge increases exponentially, and voltage increases exponentially.? 3) Am i write in thinking in...
  11. O

    Undergrad How can I differentiate modulus?

    Oh yeah, thanks,
  12. O

    Undergrad How can I differentiate modulus?

    Ok so i was wondering if what i am doing is correct, But it gets the wrong minimum point? So my function is y=|x+4| 1) y^2=x+4 2)2y(dy/dx)=1 3)dy/dx = 1/2y 4)dy/dx = 1/2|x+4| I set that 0 and get 0=1/(2(|x+4|)) Am i write in thinking this cannot be solved? or missing something...
    • ojsimon
    • Thread
    • Differentiating Modulus
    • Replies: 5
    • Forum: Calculus
  13. O

    High School Simplifying A^(-1/2) = (t^-1 + 1)/2 for A

    Thanks so much, i thought it must be something stupid..
  14. O

    High School What is the relationship between electric potential and work done?

    sorry v was meant to be voltage and came from the equation v=wd/q Thanks although i don't quite understand your integral? Thanks
  15. O

    High School Simplifying A^(-1/2) = (t^-1 + 1)/2 for A

    Hi, I am trying to simplify this equation and it won't work using this method, although i can do it using another method, so this method should work too. Could someone please look at my working and tell me where I am going wrong? -t^-1=-2A-(1/2)+1 2A^-(1/2)=t^-1 +1 A^(-1/2)=(t^-1 +1)/2...
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