AP® Physics C: Mechanics · Unit 3 · Topic 3.2
The Dot Product
Watch it explained
- How it worksHow does a dot product pick out the piece of one vector that lies along another?
- How it worksHow do you compute a dot product straight from components without ever finding the angle?
- Worked exampleFind the work done by a force of 3i + 4j newtons over a displacement of 5i - 2j meters.
- Going furtherWhat does it tell you physically when the dot product of force and displacement is exactly zero?
Check yourself
Your turn1 of 2
Find the work done by a force of 7i + 7j newtons over a displacement of 9i + -7j meters.End of topic.