If a constant force **F** pushes an object in the same
direction as the object moves, for a distance **d**,
then the work done by the force on the object is simple:

But real life is rarely so simple.
You need to know how to deal with more complicated
situations.
For example,
**what if the force is not in same direction as the motion? **

The solution is to find the component of the force which acts along the direction of motion.

- guide to finding the component of force along direction of motion
- Example: Constant force NOT
in direction of motion
The need for "the-component-of-force-in-the-same-direction-as-motion" occurs so frequently that physicists have a special shorthand notation to describe it: the

**dot product**. - a brief description of the dot product
- a problem in which the dot products helps a LOT

Copyright © Michael Richmond. This work is licensed under a Creative Commons License.