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Homework Help: Very simple kinematics object accelerates, what is the speed of the object?

  1. Jun 2, 2010 #1
    1. The problem statement, all variables and given/known data

    Starting from rest, an object accelerates at a rate of 6.3 m/s² for 2 seconds. What is the speed of the object at the end of that time?

    2. Relevant equations

    V= d/t

    3. The attempt at a solution

    If I plug in the 2 seconds to the m/s² then i get

    6.3m/4s=1.575

    I know i am messing this up, just not sure how
     
  2. jcsd
  3. Jun 2, 2010 #2

    rock.freak667

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    How is acceleration related to velocity and time?
     
  4. Jun 2, 2010 #3
    ahh, i had the wrong formula
    a = F/m what would be the net force and the mass?
     
  5. Jun 2, 2010 #4

    rock.freak667

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    while that is correct, it is not relevant here.

    So once again, how does acceleration relate to velocity and time i.e. what is the definition of acceleration?
     
  6. Jun 2, 2010 #5
    the rate of change of velocity as a function of time.

    the rate is 6.3m/s², the distance the object travels or speed is what we are looking for and the time is 2 seconds.

    if the object has a constant accelerating of 6.3m/s² for 2 seconds I would think you could just multiply 6.3 times 2.
     
  7. Jun 2, 2010 #6

    rock.freak667

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    and that would give you the answer
     
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