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Math Help - Need help solving grade 12 trig word problem.

  1. #1
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    Need help solving grade 12 trig word problem.

    A boat tied up at a dock bobs up & down with the passing waves. Vertical distance between its high & low points is 1.8 m. The cycle is repeated every 4 s. At what time or times during a cycle is the instantaneous rate of change of the vertical position of the boat equal to 0 and at what times is it a maximum?
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  2. #2
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    Re: Need help solving grade 12 trig word problem.

    Quote Originally Posted by Huggakhan View Post
    A boat tied up at a dock bobs up & down with the passing waves. Vertical distance between its high & low points is 1.8 m. The cycle is repeated every 4 s. At what time or times during a cycle is the instantaneous rate of change of the vertical position of the boat equal to 0 and at what times is it a maximum?
    where in the cycle is the boat changing its direction of motion?

    where in the cycle is the boat moving fastest in the vertical direction?

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  3. #3
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    Re: Need help solving grade 12 trig word problem.

    It'd be a sine wave, wouldn't it? Grade 12 trig, have you had derivatives yet? BTW, skeeter, how did you make that animated widget? That's cool.
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  4. #4
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    Re: Need help solving grade 12 trig word problem.

    Quote Originally Posted by zhandele View Post
    BTW, skeeter, how did you make that animated widget? That's cool.
    I didn't make it ... just searched for a SHM animation and found it.
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