Work and Power

In physics, the definition of work and power is very precise.  Work is done when an object moves in the direction of the applied force.  Forces applied perpendicular to the direction of motion do no work and forces applied opposite the direction of motion do negative work.  The equation for work is W=Fdcosθ.  When force and displacement are in the same direction, this simplifies to W=Fd.  Work is measured in Joules.

For more information on work and power view the video clips Work and Power from Discovery Education™ streaming.