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Difference between a and g

  1. Oct 8, 2007 #1
    what's the difference between a and g?? i think i know that g will almost always be associated with -9.8 meters per second squared, and that a can be any other number in many different cases ... so that's it? g is always -9.8 ??
  2. jcsd
  3. Oct 8, 2007 #2
    a is the general variable for acceleration.

    g is just one special case since we use it all the time for gravity.

    also g = 9.8 or 9.81... the - comes from the problem and how you setup your coordinate system.
  4. Oct 8, 2007 #3
    ok thanks i got it
    Last edited: Oct 8, 2007
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