A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?

Work done by the bullocks is given by the expression:
Work done = Force — Displacement
W= F — d
Where,
Applied force, F = 140 N
Displacement, d = 15 m
W= 140 — 15 = 2100 J
Hence, 2100 J of work is done in ploughing the length of the field

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