Technical Drawing - Exam Papers - Ordinary - 2008 - Paper 1

Question 4

Fig. 4 shows a circle C with a point P on its circumference. A portion of a circle D with a point Q on its circumference is in contact with the circle C as shown.

(a) Circle C rolls clockwise along the line AB until P reaches the line AB.
Plot the locus of P for this movement.

(b) Circle D rolls anticlockwise along the line AB until Q reaches the line AB.
Plot the locus of Q for this movement.