2. The pressure field in an air flow (density 1.2 kg/m3) is given by (,)=2sin+ where is in [Pa], , are in [m], and the argument of sin is in [rad]. Neglecting friction and gravity forces, what is the magnitude of the acceleration of the fluid at the point (1 m, 1 m)?

Find an expression for the gradient of the pressure field, P(x, y) = y sin x + en 1: y2 cos x + 2y sin x O 2:2y sin x O 3: y2 cos xi + 2y sin xj 4:sin x + y 5: None of the above