Technical Drawing - Exam Papers - Ordinary - 2007 - Paper 1
Below is shown a circle R and a semicircle S, which are in contact with the line AB as shown. Also shown are two points P and Q on the circumference of the circle and the semicircle respectively.
(a) The circle R rolls clockwise
along the line AB until P
reaches the line AB.
(b) The semicircle S rolls
anticlockwise along the line AB
until Q reaches the line AB.