Two blocks, and , are tied together with a light string and pulled to the right…

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Two blocks,

m_A = 4.0\,\text{kg}

and

m_B = 1.0\,\text{kg}

, are tied together with a light string and pulled to the right across a rough horizontal surface by a horizontal force of

25\,\text{N}

. The coefficient of kinetic friction between each block and the surface is

\mu_k = 0.20

. Treating the two blocks and string as a single system, determine the magnitude of the system’s acceleration.