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MotionLab
W = F · d, in joules.
In physics, 'work' has a strict meaning: force applied over a distance in the direction of motion — holding a heavy box still, no matter how tiring, does zero physics work because there's no displacement.
The work-energy theorem says the net work done on an object equals its change in kinetic energy — work is literally the mechanism by which energy transfers into or out of a moving object.
Work (J)
400
W = F · d
What you entered
Work: W = F × d
50 × 8= 400Result
Work (J): 400
Applying 50N of force over 8m of displacement does 400 joules of work.