Recent content by Champdx

  1. C

    High School Does weight change in an elevator?

    Should it be W=mg+ma?
  2. C

    Mastering Acceleration: Easily Solve for Time with this Simple Formula

    You can use this formula S=ut+1/2at^2 and take a=9.8m/s^2. Since it is falling to ground the acceleration is positive.
  3. C

    But we can't show that x = 2 is the only solution.

    Is there any way to solve this question by calculation? Thanks.
  4. C

    But we can't show that x = 2 is the only solution.

    Actually i know that the answer x=2 but how am i suppose to prove it?
  5. C

    But we can't show that x = 2 is the only solution.

    Homework Statement 2^x+3^x=13, x=2. How do i prove it? The Attempt at a Solution i did this x log 2 + x log 3 = log 13 x(log 2 + log 3)=log 13 x(0.301+0.477)= 1.11 0.778x=1.11 x=1.43
  6. C

    High School If deceleration is given instead of acceleration can i find the force

    If deceleration is given instead of acceleration can i find the force ?
    • Champdx
    • Thread
    • Acceleration Deceleration Force
    • Replies: 2
    • Forum: Mechanics
  7. C

    Graduate Debunking Time Travel Speculations: The Truth Behind Going Back in Time

    If you say they haven't discover the time machine. Is that means time machine is not in existence? This is because far in future there should be an existence of time machine, this is what been predicted by the physicist [in the present time]. This only could be a myth in my point of view. I'm...
  8. C

    Graduate Debunking Time Travel Speculations: The Truth Behind Going Back in Time

    If somebody in future discovered the time machine, why didn't they come back in time [to the present] to visit us?
  9. C

    F(x)=x+(5/x), how do i find f^-1(x)?

    Homework Statement f(x)=x+(5/x), how do i find f^-1(x)?
  10. C

    How Does Friction Affect the Ball's Velocity at the Table Edge?

    f=ma 0.23N=0.0513a a=4.48m/s^2 v^2=u^2+2as v^2=(2)^2+2(4.48)(40) v^2=360 v=19m/s s=ut+1/2at^2 0.92=(19)t+1/2(9.8)t^2 4.9t^2+19t-0.92=0 t=0.05s Correct me if I'm wrong Thanks
  11. C

    Why do we relate mass and velocity to find momentum

    Why do we relate mass and velocity to find momentum ? Champdx Thanks