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? asked in Science & MathematicsMathematics · 2 years ago

Reaction time if the distance the ruler fell before caught was 44cm?

2 Answers

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  • r77
    2 years ago

    very fast

  • TomV
    Lv 7
    2 years ago

    The question really amounts to "How long does it take for an object to fall 44cm from rest?"

    s(t) = s(0) + v(0)t + gt²/2

    s(t) = 44 cm

    s(0) = 0

    v(0) = 0

    g= 9.81m/sec² = 981 cm/sec²

    44 = 981t²/2

    t² = 88/981

    t = √(88/981) ≈ 0.30 sec (2 sig.dig.)

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