Physics

Problem

A flatbed railroad car of mass

2.0\times10^{3}\,\text{kg}

moves east at

5\,\text{m/s}

relative to the ground. A

80\,\text{kg}

worker on the car jogs west at

3\,\text{m/s}

relative to the car. Rank the magnitudes of the linear momentum relative to the ground of the following: (I) the worker alone, (II) the railroad car alone, and (III) the combined worker–car system. a) II > I > III b) III > II > I c) I > II > III d) II > III > I

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