Figure P2 on the right shows a four-bar linkage C*CDD*. C* and D* (C and D) are the two
fixed (moving) pivots. The coupler, containing the line segment AB, is supposed to move
through the three positions where the line segment is configured at A1B1, A2B2, and A3B3
as shown below on the left. The position of D* is also given as indicated. Note that A1B1
is perpendicular to the x-axis. A2B2 and A3B3 are perpendicular to the y-axis, respectively.
Given that:
(a) at configuration 1, the angle between D*D? and D?C? must be 90° (as measured
from D*D1 to D1C1 in CW direction); and
(b) DC = 0.5*AB.
(1) (5 points) Determine and sketch the position of D1, the location of the moving pivot at
D when the line segment is at the configuration 1, A1B1.
(2) (10 points) Determine and sketch the position of C*.
(Hint: you may need to first find the positions of C1, C2, and C3.)
y
AB=5 cm
B1
A3 (-5,4)
B3
A2 (-5,2)
B2
D*
A1 (1,0)
x
A
B
D
C
D
Example