The normal at any point of a involute is
A)Also normal to that circle
B)Tangent to the circle
C)Is inclined to the normal to the circle at an angle equal to pressure angle
D)Is inclined to the tangent to the circle at an angle equal to the pressure angle
E)None of the above

Question

Quizplus · Accepted Answer

The normal at any point of an involute curve is tangent to the base circle from which the involute is derived. This is because the involute is generated by unwrapping a string from around the circle, making the direction of the string at any point tangent to the circle at the point of contact.

The Normal at Any Point of a Involute Is