Three blocks A ( ), B ( ) and C ( ) are placed in contact in this order from left to…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics

Problem

Three blocks A (2 kg2\,\text{kg}), B (3 kg3\,\text{kg}) and C (5 kg5\,\text{kg}) are placed in contact in this order from left to right on a horizontal surface. The coefficient of kinetic friction between each block and the surface is 0.200.20. A horizontal force of 60 N60\,\text{N} is applied on block C toward the left. Take g=10 m s−2g = 10\,\text{m\,s}^{-2}. What is the magnitude of the contact force between blocks A and B? (a) 14 N14\,\text{N} (b) 8 N8\,\text{N} (c) 12 N12\,\text{N} (d) 20 N20\,\text{N}

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