A passenger walks east relative to a moving walkway

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A passenger walks

1.5\,\text{m/s}

east relative to a moving walkway. The walkway moves

2.0\,\text{m/s}

east relative to the train, and the train travels

18\,\text{m/s}

east relative to the ground. What is the passenger’s speed relative to the ground? (a)

23.5\,\text{m/s}

east (b)

21.5\,\text{m/s}

east (c)

17.5\,\text{m/s}

east (d)

19.5\,\text{m/s}

east