Practice question

Which curve is traced by the free end of a thread unwound from a circle or a polygon in such a way that the thread is always tight and tangential to the circle or side of the polygon?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1A logarithmic curve
2A sinusoidal curve
3An exponential curve
4An involute curve✓

Correct answer

An involute curve

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Which curve is traced by the free end of a thread unwound from a circle or a polygon in such a way that the thread is always tight and tangential to the circle or side of the polygon?

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Which curve is traced by the free end of a thread unwound from a circle or a polygon in such a way that the thread is always tight and tangential to the circle or side of the polygon?

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