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gifty91

  • 3 years ago

A wheel 90.0 cm in diameter accelerates uniformly from 205 rpm to 390 rpm. If in this process a point on the edge of this wheel have traveled 106 m, how long does this process take? (seconds)

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  1. Algebraic!
    • 3 years ago
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    hi

  2. Algebraic!
    • 3 years ago
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    \[d= r \theta \]

  3. Algebraic!
    • 3 years ago
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    \[\frac{ 106 }{ .9} = \theta \]

  4. Algebraic!
    • 3 years ago
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    convert theta to rev.s and use: \[\omega _{f}^{2} =\omega _{i}^{2} +2\alpha \theta \] to find alpha

  5. Algebraic!
    • 3 years ago
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    then find time in minutes from: \[\omega _{f} = \omega _{i} + \alpha t\]

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