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Force is mass times accelaration Question inside

  1. Apr 17, 2009 #1
    HI all

    We know that Force = Mass * Acceleration

    An object moving at constant velocity will have zero acceleration. So when it impact an object or a person, a force is felt. Equation above suggests that force is zero.

    Please explain why this equation fails for this case, and a mathematical formula for deriving the force that is actually felt.

    Awaiting answers
    Kunal Janu
  2. jcsd
  3. Apr 17, 2009 #2
    Thats becasue when you hit something, you decelerate.

    The deceleration is generally very high if you hit a brick wall, hence a large force is felt.

    Therefore the mathematical formula for the force you feel is....

  4. Apr 17, 2009 #3
    Exactly, when you hit something, your acceleration is no longer zero.

    You'll learn more about collisions when you get into momentum.
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