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7 June, 07:52

a car starts from rest and accelerates at a constant rate of 4.5 m/s^2. What is the final velocity after traveling 1.6 km?

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  1. 7 June, 08:57
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    First write down all the known values:

    vi = 0m/s

    a = 4.5m/s^2

    d = 1.6km = 1600m Remember to convert to meters since the acceleration is in meters

    vf = ?

    Now use the kinematic equation that relates all these variables:

    vf^2 = vi^2 + 2ad

    vf^2 = (0) ^2 + 2 (4.5) (1600)

    vf^2 = 14400

    vf = 120m/s

    The final velocity of the car is 120m/s.
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