physics

A car starts from rest and reaches a speed of 8.4 m/s in 5.9 seconds. What is its acceleration?

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  1. speed / time

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  2. well
    (change in speed) / time
    :)

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    Damon
  3. well
    (change in speed) / (change in time)
    :)

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    oobleck
  4. well...
    the "car starts from rest" ... zero speed and time
    ...hair splitting not needed

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  5. there is always a time interval. It just happens that its initial value is zero.

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    oobleck
  6. V = Vo+a*T
    8.4 = 0+a*5.9.
    a = 1.42 m/s^2.

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