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Involute special engineering grapics
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#involute An inelastic string of 150 mm length has one of its ends attached to the circumference of a circular disc of 40mm diameter. Draw the curve traced by the other end of the string when it is completely unwound from around the disc keeping the string always tight. Also draw the tangent and normal to the obtained curve at a point 100mm away from the centre of the disc.
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