Posted by **michaela c** on Monday, March 26, 2012 at 1:25pm.

a car's wheel turns at 200 rpm. the radius of each wheel is 1.3 ft. to the nearest radian per minute, what is the angular velocity of a point: on the tire thread? on the hubcap .4ft from the center? right at the center?

- math -
**Steve**, Monday, March 26, 2012 at 2:47pm
the angular velocity is the same for all points anywhere from the axle to the tire surface.

angular velocity is radians/minute

200 rev/min * 2pi rad/rev = 400pi rad/min

Now, if you want linear velocity, that is radius * angular velocity.

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