When a force causes the displacement of an object, it is said that work was done upon that object. The work (W) done by a force during a linear displacement is giving by:

W = ?a?b?? F(x)

Where a and b represent the initial and the final positions respectively. When the force is constant along a straight line then the basic work relationship ? = ? ? ? is applied, where d denotes distance (the magnitude of the linear displacement). The IS (International System) unit of work is Joules (J).

In order to study the concept of work, students conducted an experiment where they measured the force applied (using a force sensor) over a cart placed in a linear/horizontal track, and the respective velocity of the cart during a period of time. (The result is in the table bellow)

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