- In Physics, force is defined as the push or pull on an object with mass that causes it to change its velocity.
- Work is said to be done when a force applied to an object moves that object.
- The SI unit of work is the joule (J), which is defined as the work done by a force of 1 Newton in moving an object through a distance of 1 meter in the direction of the force.
The expression gives work done by the bullocks:
Work done = Force – Displacement
W= F – d
- 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