Question

The curve formed by the point on a circle as it rolls along a straight line is known as

(a) cycloid

(b) addendum

(c) base circle

(d) none of the mentioned

This question was posed to me in examination.

This interesting question is from Gearing in division Toothed Gearing & Gear Trains of Machine Kinematics

Answer 1

Right option is (a) cycloid

Explanation: Length of the arc of the pitch circle between the centres or other corresponding points of adjacent teeth is known as circular pitch.

The circle from which an involute curve is generated is known as base circle.

The curve formed by the point on a circle as it rolls along a straight line is known as cycloid.