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4 December, 19:49

Acceleration of 12 meters/secondsecond2 car mass 1515 kilograms to reach acceleration of 15 meters/second 2

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  1. 4 December, 20:03
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    I guess the following digits are only the given but I'm assuming that this is the question:

    A car maker has designed a car that can reach a maximum acceleration of 12 meters/second^2. The car’s mass is 1,515 kilograms. Assuming the same engine is used, what should the car’s mass be if the car maker wants to reach an acceleration of 15 meters/second^2?

    Then the choices are the following:

    A 1,212 kg

    B 1,335 kg

    C1,466 kg

    D 1,515 kg

    E 1,894 kg

    The answer is E. 1,894 kg.

    Solution:

    USE ratio and proportion

    m1/a1=m2/a2

    1515kg/12meter per seconds = (unknown mass) / 15 meters per seconds

    let n be the unknown mass

    1515 (15) = 12 (n)

    1515 (15) / 12=n

    n=1,894 kg
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