Vectors - dot product and cross product?

  • #1
Vectors -- dot product and cross product?

Hello

may i know when to dot product and cross product?? both look to same to me..
 

Answers and Replies

  • #2
NascentOxygen
Staff Emeritus
Science Advisor
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The formula will tell you which to use, so pay close attention.

Basically, the dot product produces a scalar result---it has a magnitude and a + or - sign---but it isn't a vector. The cross product produces an answer which is itself a vector, and it's at right-angles to the plane containing the two vectors you multiplied.
 
  • #3
berkeman
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