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Homework Help: Changing Velocities Questions

  1. Apr 14, 2012 #1
    1. The problem statement, all variables and given/known data

    I need to know if these set of velocities changing correspond to acceleration or
    deceleration?

    -0.9m/s - +4m/s
    +4m/s-4.5m/s

    2. Relevant equations

    3. The attempt at a solution

    I think that

    +4m/s-+5m/s is considered acceleration in the same direction
    -5m/s-7m/s is considered acceleration in the negative direction




    My chemistry told me that it the first example would be an example of a deceleration then an acceleration due to it becoming zero and then accelerating to +4m/sec and that the same idea applies to the second example.
     
    Last edited: Apr 15, 2012
  2. jcsd
  3. Apr 14, 2012 #2
    m/s (which is Metres per second) is the unit for Velocity not acceleration.

    I don't know about everybody else, but personally im not sure what your asking :confused:
     
  4. Apr 14, 2012 #3
    lets say those were in m/sec^2, would they be deceleration, acceleration or a combination of both?
     
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