Two crates connected by a rope lie on a horizontal surface. Crate A has mass mA, crate B has mass mB and the coefficient of kinetic friction between each crate and the surface is pk. The crates are pulled to the right at constant velocity by a horizontal force F. Draw one or more free-body diagrams to calculate the following in terms of the masses and friction coefficient: (1) the magnitude of F (2) the tension in the rope connecting the blocks.