Mission WE1 Work
Getting your Trinity Audio player ready...
Hold down the T key for 3 seconds to activate the audio accessibility mode, at which point you can click the K key to pause and resume audio. Useful for the Check Your Understanding and See Answers.

In order to have work done upon an object, there must be a(n) ____ to cause a(n) ____.

Definition of Work:
When a force acts upon an object to cause (or to hinder) a displacement, work is done upon the object. Mathematically, work is the dot product of the force and displacement for such a situation.
When a force acts upon an object to cause (or to hinder) a displacement, work is done upon the object. Mathematically, work is the dot product of the force and displacement for such a situation.

As the definition of work implies, there are three ingredients of work: force, displacement, and cause. There must obviously be a force acting upon an object; the object must be displaced or moved from its position. And there must be a cause-effect relationship between the force and the motion.