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- Work can also be viewed as the area
- under a graph of force versus distance.
- Work and torque both have units of
- Newton-meters. In cases of work, this unit
- is also called the Joule. Both work and
- torque are defined by a product of a force
- and a distance. However, work is defined by
- a dot product and is therefore a scalar
- quantity, while torque is defined by a cross
- product and is therefore a vector quantity.
- Since work is a dot product, only the forces
- parallel to the direction of motion affect the
- work. With torque, however, the cross
- product shows that only the forces
- perpendicular to the radius or distance
- affect the torque.
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