Homework Help: physics

Posted by Anonymous on Wednesday, November 3, 2010 at 10:16pm.

ssm A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. The string rotates at an angular speed of 56 rev/s, and its tip has a tangential speed of 60 m/s. What is the length of the rotating string?
in m

physics - Claudia, Monday, April 30, 2012 at 10:37am
Vt=rw
r=Vt/w
so:
r = 60m/s÷[56rev/s(2πrad/1rev)
r=0.17 m

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