The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 61.8 miles per hour?

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  1. g is about 32 ft/s^2 in these obsolete units

    61.8 miles/hr * 5280 ft/mi * 1 hr/3600seconds
    = 90.6 ft/s

    7 * 32 = 224 ft/s^2

    a = change in v/change in tim

    224 = 90.6/t
    t = .4 seconds

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