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September 21, 2014

September 21, 2014

Posted by **David** on Tuesday, February 12, 2013 at 10:57pm.

A) Find the number of revolutions per minute the wheels are rotating.

B) Find the angular speed of the wheels in radians per minutes.

- Trignometry -
**Reiny**, Tuesday, February 12, 2013 at 11:45pmso the radius is 1 ft

and the circumference is 2π

55 mph = 55(5280)/60 ft/min

= 4840 ft/min

so rotations per min = 4840/2π

= 770.31

since 1 rotation is 2π radians

angular speed = 4840/(2π) * 2π = 4840 radians/min

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