S shermaine New Member Apr 10, 2004 #1 Hello, May i know what cases to use dot product and cross product? Pls advise. Thanks.
Nigel Goodwin Super Moderator Most Helpful Member Apr 10, 2004 #2 shermaine said: Hello, May i know what cases to use dot product and cross product? Pls advise. Thanks. Click to expand... If you google for +"dot product" +"cross product" you get plenty of hits, is there any electronic reason for the question?. Probably if you don't know which to use, you don't need them!.
shermaine said: Hello, May i know what cases to use dot product and cross product? Pls advise. Thanks. Click to expand... If you google for +"dot product" +"cross product" you get plenty of hits, is there any electronic reason for the question?. Probably if you don't know which to use, you don't need them!.
daviddoria New Member Apr 10, 2004 #3 cross product yields a vector quantity that is orthogonal to both vectors that you crossed dot product yields a scalar quantity. a simple appliaction is work = F (dot) d F(dot)d = mag(F) mag(d) cos THETA so if you use that for work, you automatically get the component of the force that is doing the work (in the same direction) good luck david
cross product yields a vector quantity that is orthogonal to both vectors that you crossed dot product yields a scalar quantity. a simple appliaction is work = F (dot) d F(dot)d = mag(F) mag(d) cos THETA so if you use that for work, you automatically get the component of the force that is doing the work (in the same direction) good luck david