tangential acceleration??

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An ultracentrifuge accelerates from rest to 100,000 rpm in 2.00 min. What is the tangential acceleration of a point 9.50 cm from the axis of rotation? Your answer should be given in m/sec squared.

Tangential acceleration = angular acceleration * radius

How would I find this?

  • tangential acceleration?? -

    angular acceleration = (1E5 * 2 * π) / (2 * 60)
    ... rad/s^2

    the radius is ... .095 m

  • tangential acceleration?? -

    That gives me 497.42...it's wrong

  • tangential acceleration?? -

    change in angular velocity
    = 10^5 * 2 pi radians/60 seconds

    change in time = 2 * 60 seconds
    so I get
    10^5 * 2 *pi /(120*60)

    multiply that by .095
    or just divide previous answer by 60

  • tangential acceleration?? -

    is it a significant figure issue?

    you've got 5 in your answer

    but there is only one in the rpm data

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