Recent content by Yay

  1. Y

    Simple (or should be) Trigonomic question

    I worked it out. Turns out sec is the reciprocal of cos, arccos is the inverse function. I'm annoyed I forgot something so basic, but at least its all working now.
  2. Y

    Simple (or should be) Trigonomic question

    We were told to use Cartesian, not spherical. Gonna have another read through the wiki page, its got to be there somewhere.
  3. Y

    Simple (or should be) Trigonomic question

    Homework Statement I'm making a program that tracks an object moving along the surface of a sphere (earth). I'm using a set of Cartesian coordinates who origin is the center of the Earth and Z directed through the north pole, X the greenwich meridian at the equator, and Y is 90 degrees to...
  4. Y

    Law of universal gravitation - why DON'T heavy objects fall faster in a vacume

    Thanks guys, I understand it now :)
  5. Y

    Law of universal gravitation - why DON'T heavy objects fall faster in a vacume

    I'm trying to understand the basics of gravity. Newtons law of universal gravitation gives us : F1 = F2 = G (m1m2)/r2 Now on Earth you can simply that down to F = mg where g = G (mearth/R2) But using f = mg, a heavier object say a tennis ball should fall faster than a cannon ball. But...
    • Yay
    • Thread
    • Fall Gravitation Law Universal Universal gravitation
    • Replies: 9
    • Forum: Mechanics
  6. Y

    Friction and Max accleration, please explain this example.

    Homework Statement I'm trying to develop an expression for the maximum accerlation of a person pushing an object up a slope. I've figured out an expression for acceleration using F = MA based on the forces acting on the person and the object. Now I need to find the max accerlation. We...
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