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Math Help - really hard question:P

  1. #1
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    really hard question:P

    The period of a pendulum is the time it takes to swing back and forth, returning to its original posistion. The relationship between the period, T(in seconds) and teh length of the pendulum L (in meters) is as follows T^2-4L=0
    Correct to the nearest tenth of a second what is the period of the pendulum 3 m long?
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  2. #2
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    Quote Originally Posted by mcinnes View Post
    The period of a pendulum is the time it takes to swing back and forth, returning to its original posistion. The relationship between the period, T(in seconds) and teh length of the pendulum L (in meters) is as follows T^2-4L=0
    Correct to the nearest tenth of a second what is the period of the pendulum 3 m long?
    Take the given equation, plug in the given value of L and solve for T:

    T^2-4\cdot 3=0~\implies~T=\sqrt{12}~\approx 3.464\ s

    (Keep in mind that you have to modify this value!)
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