Cart X of mass glides along a nearly frictionless

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

Cart X of mass 0.20 kg0.20\,\text{kg} glides along a nearly frictionless, horizontal track at 3.0 m/s3.0\,\text{m/s} toward cart Y of mass 0.30 kg0.30\,\text{kg} that is at rest. The two carts collide elastically. A third cart Z of mass 0.40 kg0.40\,\text{kg} is stationary several meters away and does not interact during the time interval considered. Which of the following gives the speed and direction of cart X immediately after its collision with cart Y? (a) 0.60 m/s0.60\,\text{m/s}, same direction as original motion (b) 0.60 m/s0.60\,\text{m/s}, opposite its original direction (c) 1.2 m/s1.2\,\text{m/s}, same direction as original motion (d) 2.4 m/s2.4\,\text{m/s}, same direction as original motion

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