Work is said to be one Joule when a force of

In physics, work is defined as the product of the force applied to an object and the displacement of that object in the direction of the force. The SI unit of work is the Joule (J), where 1 Joule is defined as the work done by a force of 1 Newton (N) causing a displacement of 1 meter (m). Mathematically, Work (W) = Force (F) × Displacement (d). To determine which option equals 1 Joule, we convert all distances to meters and calculate: (1) 4 N × 0.25 m = 1 J; (2) 2 N × 1 m = 2 J; (3) 1 N × 0.01 m = 0.01 J; (4) 1 N × 0.5 m = 0.5 J. Therefore, a force of 4 N moving an object by 25 cm (0.25 m) results in exactly one Joule of work.