Question: A small block with mass 0.0400 kg is moving in the xy-plane. The net force on the block is described by the potential energy function

A small block with mass 0.0400 kg is moving in the xy-plane. The net force on the block is described by the potential energy function U(x, y) = (5.80 J/m2)x2 - (3.60 J/m3)y3. What are the magnitude and direction of the acceleration of the block when it is at the point (x = 0.300 m, y = 0.600 m)?

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