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Homework Help: Calculate the velocity of the particle at t=4.0 s.

  1. Nov 22, 2009 #1
    A 2.0 kg particle is moving along the x axis to the left with a velocity of v= -6.0 m/s. Suddenly, between times t =0 and t = 4.0 x a net force = 3t^2 – 12t is applied to the particle, where F is in N and t is in s. Calculate the velocity of the particle at t=4.0 s.
    I am having trouble making the numbers work. Thanks
  2. jcsd
  3. Nov 22, 2009 #2


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    Homework Helper

    Re: velocity

    Well, what have you tried so far?
  4. Nov 22, 2009 #3
    Re: velocity

    Someone told me to use this formula but I don't understand why the 4 is in the first equation because the mass is 2 kg
  5. Nov 22, 2009 #4
    Re: velocity

    Sorry, the formula is
    a= force/mass= (3t^2-12t)/4

    Why is there a 4?
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