Question

a string of length 180 mm is wound round pentagon of 20mm side. draw the path traced by the string​

Answer 1

An inelastic string of 150 mm long, has its one end attached to the circumference of a circular disc of 40 mm diameter. Draw a curve traced out by the other end of the string, when it completely wound around the disc, keeping the string always tight. Name the curve. Also draw a tangent and normal to the curve through any point.

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