13-41. Block A has a mass m, and is attached to a spring having a stiffness k and unstretched length . If another block B, having a mass mp, is pressed against A so that the spring deforms a distance d, determine the distance both blocks slide on the smooth surface before they begin to separate. What is their velocity at this instant? 13-42. Block A has a mass m, and is attached to a spring having a stiffness k and unstretched length l. If another block B, having a mass mp, is pressed against A so that the spring deforms a distance d, show that for separation to occur it is necessary that d > 2µ8(ma + mg)/k, where Hi is the coefficient of kinetic friction between the blocks and the ground. Also, what is the distance the blocks slide on the surface before they separate? www A

13-41. Block A has a mass m, and is attached to a spring having a stiffness k and unstretched length . If another block B, having a mass mp, is pressed against A so that the spring deforms a distance d, determine the distance both blocks slide on the smooth surface before they begin to separate. What is their velocity at this instant? 13-42. Block A has a mass m, and is attached to a spring having a stiffness k and unstretched length l. If another block B, having a mass mp, is pressed against A so that the spring deforms a distance d, show that for separation to occur it is necessary that d > 2µ8(ma + mg)/k, where Hi is the coefficient of kinetic friction between the blocks and the ground. Also, what is the distance the blocks slide on the surface before they separate? www A