Physicshard · Past Paper
A body covers 1/3 of its journey with speed 'u', next 1/3 with 'v' and last 1/3 with 'w'. The average speed is:
A(u+v+w)/3
B3uvw / (uv+vw+wu)
Cuvw / (u+v+w)
D3(u+v+w)
✓ Correct Answer: B — 3uvw / (uv+vw+wu)
For three equal segments of distance, the average speed is the harmonic mean of the individual speeds.
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