A certain automobile is 6.0 m long if at rest. If it is measured to be 4.8 m long while moving, its speed is:

Question

A certain automobile is 6.0 m long if at rest. If it is measured to be 4.8 m long while moving, its speed is:

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Thiên Hương 5 years 2021-07-31T06:37:12+00:00 1 Answers 68 views 0

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  1. kimcuc
    0
    2021-07-31T06:38:15+00:00
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    Answer:

    1.8*10^8m/s

    Explanation:

    Using

    L= lo√1-v²/c²

    So making v subject we have

    V= c√1-4.8²/6²

    V= 0.6*c

    V= 0.6*3E8m/s

    V= 1.8*10^8m/s

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