## anonymous 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. anonymous

hi

2. anonymous

$d= r \theta$

3. anonymous

$\frac{ 106 }{ .9} = \theta$

4. anonymous

convert theta to rev.s and use: $\omega _{f}^{2} =\omega _{i}^{2} +2\alpha \theta$ to find alpha

5. anonymous

then find time in minutes from: $\omega _{f} = \omega _{i} + \alpha t$