Physics

Problem

Cart X of mass

0.20\,\text{kg}

glides along a nearly frictionless, horizontal track at

3.0\,\text{m/s}

toward cart Y of mass

0.30\,\text{kg}

that is at rest. The two carts collide elastically. A third cart Z of mass

0.40\,\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\,\text{m/s}

, same direction as original motion b)

0.60\,\text{m/s}

, opposite its original direction c)

1.2\,\text{m/s}

, same direction as original motion d)

2.4\,\text{m/s}

, same direction as original motion

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