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Math Help - Angular Velocity and other problems

  1. #1
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    Angular Velocity and other problems

    1) A rotating body has an angular displacement of (teta) radians in time (t) seconds, the relationship between displacement and the time is

    (teta) = 7t^3-5t^2+30

    find:
    angulaer velocity when t = 3second
    the acceleration when t = 3
    the time when the acceleration = 0

    2)
    water drain from a cylindrical tank of radius 4 meter. as the height h falls the pressure reduces and it is observer that the relationship h and time t is given by
    h= 5e^t/21

    find the rate that the heiht is falling after 3 s
    the flow rate in liter persecond after 3 seconds


    please can someone help me in solving the above problems and an explaination on the method .

    thank you in advance.
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  2. #2
    MHF Contributor
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    Quote Originally Posted by taichi2910 View Post
    1) A rotating body has an angular displacement of (teta) radians in time (t) seconds, the relationship between displacement and the time is (teta) = 7t^3-5t^2+30...

    please can someone help me in solving the above problems and an explaination on the method .
    What quarrel do you have with the reply posted in your other thread for this exercise?

    Please reply to that thread with specifics. Thank you!
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