Yes, work is done because the bullock exerts a force on the cart, and the cart is displaced.
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Because a force is applied to the book, and it is displaced through a height, satisfying both conditions for work.
A force must act on an object, and the object must be displaced.
These examples illustrate that work involves both force and movement in the direction of the force, aligning with the scientific definition that work equals force times distance.
No, work is not done if there is no displacement, even if force is applied.