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#### karush

##### Well-known member

- Jan 31, 2012

- 2,834

What is the linear speed of a point on the rim, in $\displaystyle\frac{cm}{min} $.

$s=r\theta$ so $7.5(7) = 152$cm

then $\displaystyle v=\frac{s}{t}=\frac{152cm}{s}\cdot\frac{60s}{min}=\frac{1320cm}{min}$

I am not sure just what a Radian (rad) is in this, so hope I didn't make this to simple. don't have answer so hope mine ok