A car travels at along a straight road and then another in the same direction at

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

Problem

A car travels

60\,\text{km}

at

30\,\text{km/h}

along a straight road and then another

60\,\text{km}

in the same direction at

60\,\text{km/h}

. Calculate its average speed for the whole journey. (a)

50\,\text{km/h}

(b)

45\,\text{km/h}

(c)

40\,\text{km/h}

(d)

30\,\text{km/h}

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