Also, no work is done on a body moving circularly at a constant speed while constrained by mechanical force, such as moving at constant speed in a frictionless ideal centrifuge.
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The displacement is 0.
If the body does not move due to the applied force, then regardless of how large the force is, work done will be zero.
If a particular object is falling, the particle is forced to point in the direction of gravity.
Here, work is being done on the system.