The ancient Greek understanding of physics was limited to the statics of simple machines (the balance of forces), and … See more

The SI unit of work is the joule (J), named after the 19th-century English physicist James Prescott Joule, which is defined as the work required to exert a force of one newton through a displacement of one metre. … See more

The work W done by a constant force of magnitude F on a point that moves a displacement s in a straight line in the direction of the force is the product
For example, if a force of 10 newtons (F = 10 N) acts … See more

Constraint forces determine the object's displacement in the system, limiting it within a range. For example, in the case of a slope plus gravity, the object is stuck to the slope and, when attached to a taut string, it cannot mov… See more

For moving objects, the quantity of work/time (power) is integrated along the trajectory of the point of application of the force. Thus, at any instant, the rate of the work done by a force (measured in joules/seco… See more

The scalar product of a force F and the velocity v of its point of application defines the power input to a system at an instant of time. Integration of this power over the trajectory of the point of application, C = x(t), define… See more