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7 August, 09:46

How many seconds of space should you keep between you if you're driving a 100 foot truck 30 mph?

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  1. 7 August, 10:00
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    The space in seconds that will be kept = 2.27 seconds

    Explanation:

    S = d/t ... Equation 1

    making t the subject of formula in the equation above,

    t = d/S ... Equation 2

    Where S = speed, d = distance, t = time.

    Conversion: (i) if 1 mph = 0.44704 m/s,

    then, 30 mph = 30*0.44704

    = 13.41 m/s

    (ii) If 1 foot = 0.3048 m

    then, 100 foot = 30.48 m.

    Given: S = 30 mph = 13.41 m/s, d = 100 foot = 30.48 m

    Substituting these values into equation 2

    t = 30.48/13.41

    t = 2.27 seconds.

    Therefore the space in seconds that will be kept = 2.27 seconds
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