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

asked by Anonymous

14 years ago

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1 answer

Vt=rw
r=Vt/w
so:
r = 60m/s÷[56rev/s(2πrad/1rev)
r=0.17 m

answered by Claudia

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Question

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

Claudia · Answer

Vt=rw r=Vt/w so: r = 60m/s÷[56rev/s(2πrad/1rev) r=0.17 m