A В Two crates connected by a rope lie on a horizontal surface (see figure above). Crate A has mass of 20 kg and crate B has mass 14 kg . The coefficient of kinetic friction between each crate and the surface is 0.39. The crates are pulled to the right at a constant velocity of 1 m/s by a constant horizontal force F. What is the magnitude of the tension (in N) in the rope?

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