x - Balliol College - University of Oxford

C.M. Martin - July 2011
Revision 2 Part A
Figure 3
5. Figure 4 shows a plan view of a circular table of radius 400 mm
and weight 400 N supported symmetrically by three vertical legs at
points A, B and C located at the corners of an equilateral triangle of
side 500 mm. An object weighing 230 N is placed at a point D on the
bisector of angle ABC and a distance x from AC. Assume that the
reactions at A, B and C are vertical.
B
500
400
A
x
C
D
Figure 4