Cross product question of j ,k

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SUMMARY

The discussion centers on calculating cross products involving the unit vectors j and k. Participants emphasize using the right-hand rule and the definition of cross product through determinants. The specific calculations discussed include j × j, j × k, and k × k, with a focus on understanding the properties of these vector operations. The conclusion reinforces the importance of applying the cross product definition to solve vector problems accurately.

PREREQUISITES
  • Understanding of vector operations, specifically cross products.
  • Familiarity with unit vectors, particularly j and k.
  • Knowledge of the right-hand rule for determining vector directions.
  • Basic skills in calculating determinants.
NEXT STEPS
  • Study the properties of cross products in vector algebra.
  • Learn how to compute determinants for 2x2 and 3x3 matrices.
  • Explore applications of cross products in physics, such as torque and angular momentum.
  • Practice solving vector problems using the right-hand rule and cross product definitions.
USEFUL FOR

Students and professionals in physics and engineering, particularly those studying vector calculus and mechanics, will benefit from this discussion.

krot
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http://i26.tinypic.com/27zdaiv.gif

i know that i should do right hand rule to know the result
but here the vectors are weird

??
 
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Just multiply it out, taking the cross-products of each component.

j X j = ?
j X k = ?
k X k = ?
 
ahh i could solve it by definition of cross product
by determinant
thanks
 

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