A car travels east at and then west at along the same straight highway

PHYSICS · Single correct · CBSE · Physics · Motion · Motion

Problem

A car travels 60 km60\,\text{km} east at 40 km/h40\,\text{km/h} and then 90 km90\,\text{km} west at 60 km/h60\,\text{km/h} along the same straight highway. Determine (i) the car’s average speed and (ii) the magnitude and direction of its average velocity for the whole trip. (a) 50 km/h;  50 km/h50\,\text{km/h};\;50\,\text{km/h} east (b) 40 km/h;  20 km/h40\,\text{km/h};\;20\,\text{km/h} west (c) 50 km/h;  10 km/h50\,\text{km/h};\;10\,\text{km/h} west (d) 50 km/h;  0 km/h50\,\text{km/h};\;0\,\text{km/h}

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