A runner moves east relative to a flatcar

PHYSICS · Single correct · CBSE · Physics · Motion in a Plane · Motion in a Plane

Problem

A runner moves 4 m/s4\,\text{m/s} east relative to a flatcar. The flatcar moves 10 m/s10\,\text{m/s} west relative to a train, and the train moves 12 m/s12\,\text{m/s} east relative to the ground. What is the runner’s speed relative to the ground? (a) 2 m/s2\,\text{m/s} west (b) 6 m/s6\,\text{m/s} east (c) 6 m/s6\,\text{m/s} west (d) 2 m/s2\,\text{m/s} east

Related theory

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