Question:

Time - Kinematics?

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If a car rolls gently (v(initial) =0) off a vertical cliff, how long does it take it to reach 75 km/h?

Answer in seconds

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  1. In free fall objects accelerate at 9.8 m/s^2

    75 km/h = 20.8 m/s

    divide the final speed by the acceleration to get the time

    20.8 / 9.8 = 2.1 seconds

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