A puck and a puck are initially at rest on a frictionless horizontal surface and are…

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

A 2.0 kg2.0\,\mathrm{kg} puck and a 3.0 kg3.0\,\mathrm{kg} puck are initially at rest on a frictionless horizontal surface and are connected by a compressed spring. The spring is released, and the pucks move directly away from each other along the same line. At the instant when the distance between the pucks is increasing at 10 m/s10\,\mathrm{m/s}, what is the speed of the 3.0 kg3.0\,\mathrm{kg} puck? (a) 6 m/s6\,\mathrm{m/s} (b) 5 m/s5\,\mathrm{m/s} (c) 4 m/s4\,\mathrm{m/s} (d) 203 m/s\dfrac{20}{3}\,\mathrm{m/s}

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