If the blocks A and B are moving towards each other with accelerations a and b as shown in the figure, find the net acceleration of block C.

From length constraint l1+l2+l3+l4=Cl1′′+l2′′+l3l′+l4′′=0(−a−b)+0+(−a−b)+c=0c=2a+2bFrom wedge constraints, acceleration of C is right side is a.acceleration of C w.r.t. ground =ai^−2(a+b)j^