Four rods each of length 
have been hinged to form a rhombus. Vertex A is fixed to rigid support, vertex C is being moved along the x -axis with a constant velocity v as shown in the figure. The rate at which vertex B is approaching the x -axis at the moment the rhombus is in the form of a square is -
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let AC = x and BE = y
Then, BE 2 + AE 2 = 
2 or 
x = 2y , when the rhombus is a square.
Hence, 
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