Question Bank • QB_EXP_FP_004 NAT • 2 Marks

Section 3: Farm Power

Sources of Power

Subtopic: Sources of power on the farm – human, animal, mechanical, electrical, wind, solar and biomass

Question Statement:

A pair of bullocks walking at an average forward speed of 3.6 km/h exerts an average sustained draft of 1200 N. The power developed by the pair of bullocks in kW is ________ (rounded off to 1 decimal place).

Answer Key:

1.2

Step-by-Step Solution & Explanation

1. Draft force $F = 1200\text{ N}$. 2. Forward speed $v = 3.6\text{ km/h} = \frac{3.6 \times 1000}{3600} = 1.0\text{ m/s}$. 3. Power developed $P = F \times v = 1200\text{ N} \times 1.0\text{ m/s} = 1200\text{ W} = 1.2\text{ kW}$.
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