Q. A pair of Oxen exerts a force of 140 newton while ploughing the field. The field ploughed is 15 meter long. The work done in ploughing the length of the field is :

Correct Answer: a) 2100 Joule

Explanation:
– Work done (W) = Force (F) × Displacement (s) × cos(θ)
– Here, the force is along the direction of motion, so θ = 0° and cos(0°) = 1.
– W = 140 N × 15 m × 1 = 2100 N·m = 2100 J
Hence, the work done is 2100 Joule.