一、临界问题回顾 Diagram Description: Type: Schematic diagram illustrating a physics problem setup. Elements: Two rectangular blocks are shown. Block A is placed on top of block B. Block A is labeled "A: m". Block B is labeled "B: M". A horizontal arrow points to the right, originating from the right side of block A, labeled "F". This represents a force applied to block A. The coefficient of friction between A and B is indicated by the symbol "μ" above the contact surface. There is no friction shown between block B and the surface it rests on (implied). Given Information: μ = 0.5 m = 2kg M = 3kg Questions: 当 F = ?, m才能动? 当 F = 5N, f_{BA} = ? 当 F = 10N, A,B 是否相对滑动? 当 F = 15N, A,B 是否相对滑动? 当 F = ? A,B 相对滑动? 当 F = 20N 时: a_A = ? a_B = ?---一、临界问题回顾 **Diagram Description:** * Type: Schematic diagram illustrating a physics problem setup. * Elements: * Two rectangular blocks are shown. * Block A is placed on top of block B. * Block A is labeled "A: m". * Block B is labeled "B: M". * A horizontal arrow points to the right, originating from the right side of block A, labeled "F". This represents a force applied to block A. * The coefficient of friction between A and B is indicated by the symbol "μ" above the contact surface. There is no friction shown between block B and the surface it rests on (implied). **Given Information:** μ = 0.5 m = 2kg M = 3kg **Questions:** 1) 当 F = ?, m才能动? 2) 当 F = 5N, f_{BA} = ? 3) 当 F = 10N, A,B 是否相对滑动? 4) 当 F = 15N, A,B 是否相对滑动? 5) 当 F = ? A,B 相对滑动? 6) 当 F = 20N 时: a_A = ? a_B = ?