A person walks due east in

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

A person walks 3 km3\,\text{km} due east in 30 min30\,\text{min}, then 4 km4\,\text{km} due north in 40 min40\,\text{min}, and finally 3 km3\,\text{km} due west in 30 min30\,\text{min}. Which of the following pairs correctly gives (average speed, magnitude of average velocity) for the entire 100 min100\,\text{min} journey? (a) (6 km h−1,  6 km h−1)\bigl(6\,\text{km h}^{-1},\;6\,\text{km h}^{-1}\bigr) (b) (7.1 km h−1,  2.9 km h−1)\bigl(7.1\,\text{km h}^{-1},\;2.9\,\text{km h}^{-1}\bigr) (c) (6 km h−1,  2.4 km h−1)\bigl(6\,\text{km h}^{-1},\;2.4\,\text{km h}^{-1}\bigr) (d) (6 km h−1,  0 km h−1)\bigl(6\,\text{km h}^{-1},\;0\,\text{km h}^{-1}\bigr)

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