Blocks and , each of mass , are connected by a light string and placed one after the…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Blocks PP and QQ, each of mass 5 kg5\,\text{kg}, are connected by a light string and placed one after the other on a rough horizontal table. The coefficient of kinetic friction between each block and the table is 0.200.20. The free end of the string passes over a smooth pulley at the edge of the table and supports a 3 kg3\,\text{kg} hanging block RR. When the system is released from rest, the acceleration of the system is closest to (take g=10 m s−2g = 10\,\text{m s}^{-2}) (a) 1.54 m s−21.54\,\text{m s}^{-2} (b) 1.00 m s−21.00\,\text{m s}^{-2} (c) 0.77 m s−20.77\,\text{m s}^{-2} (d) 2.31 m s−22.31\,\text{m s}^{-2}

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