The pebble must be moved through a distance by an exerted force.
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The work done would be zero if either the force F is zero, the displacement s is zero, or if the force is not acting in the direction of the displacement (assuming there is no component of the force in ...
The formula for work when the force and displacement are in the same direction is = × W = F × s, where W is the work done, F is the force, and s is the displacement.
The work done W is calculated by multiplying the force F by the displacement s: = × W=F × s.
The conditions considered are that a constant force F acts on an object, and the object is displaced through a distance s in the direction of the force.