For a two-dimensional flow, the velocity field is u =xi +yjx + y x + y where i and j are the basis vectors in the x y Cartesian coordinate system. Identify the CORRECT statements from below. 1. The flow is incompressible 2. The flow is unsteady 3. y-component of acceleration, ay = - y(x + y ) 4. x-component of acceleration, ax = -(x + y)(x + y )

For a two-dimensional flow, the velocity field is u =xi +yjx + y x +

1.	For a two-dimensional flow, the velocity field is u =xi +yjx + y x + y where i and j are the basis vectors in the x y Cartesian coordinate system. Identify the CORRECT statements from below. 1. The flow is incompressible 2. The flow is unsteady 3. y-component of acceleration, ay = - y(x + y ) 4. x-component of acceleration, ax = -(x + y)(x + y )
A.	2 and 3
B.	1 and 3
C.	1 and 2
D.	3 and 4
Answer» C. 1 and 2

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