Technical Drawing - Exam Papers - Higher - 1992 - Paper 1

Question 4

Fig. 3 shows two circles. A and B, in contact. Also shown is a point P on the circumference of the circle A.

(a) Determine the radius of circle A and draw the given figure.

(b) The circle A rolls clockwise along the circumference of the circle B for one-quarter of a revolution and, at the same time, the circle B rolls clockwise along the line CD for one-quarter of a revolution.
Draw the locus of the point P for the combined movement.