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Math Help - Rotating Water Wheel question.

  1. #1
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    Rotating Water Wheel question.

    A nail pinned onto a rotating waterwheel moves according to this function: h(t) = -5sin[pi/4(t-1)] +2.5 where t is the time in seconds and h is height in metres

    *Calculate the durations of time where the nail is underwater for the first 24 seconds

    im kinda confused as to what to sub in for h, because i know the highest the wheel goes is 7.5m, and the lowest it goes is -2.5m. Should my h be zero or 2.5?

    thanks in advance
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  2. #2
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    Quote Originally Posted by ferken View Post
    A nail pinned onto a rotating waterwheel moves according to this function: h(t) = -5sin[pi/4(t-1)] +2.5 where t is the time in seconds and h is height in metres

    *Calculate the durations of time where the nail is underwater for the first 24 seconds

    im kinda confused as to what to sub in for h, because i know the highest the wheel goes is 7.5m, and the lowest it goes is -2.5m. Should my h be zero or 2.5?

    thanks in advance
    sounds like h is defined as height above water level.

    I'd say h = 0
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