Volume of parallelepiped(Linear Algebra)

  • Thread starter Thread starter Sheneron
  • Start date Start date
  • Tags Tags
    Algebra Volume
Click For Summary
SUMMARY

The volume of a parallelepiped defined by vectors u, v, and w is calculated using the formula |u · (v × w)|, where "·" denotes the dot product and "×" denotes the cross product. The discussion emphasizes understanding that the dot product of two vectors represents the area of a parallelogram, and the height of the parallelepiped is determined by the projection of a vertical line onto the plane orthogonal to the two vectors. This geometric interpretation is crucial for solving related problems in linear algebra.

PREREQUISITES
  • Understanding of vector operations, specifically dot product and cross product.
  • Familiarity with geometric interpretations of linear algebra concepts.
  • Knowledge of vector norms and their significance in volume calculations.
  • Basic principles of projections in vector spaces.
NEXT STEPS
  • Study the properties of the dot product and cross product in vector algebra.
  • Explore geometric interpretations of vector operations in linear algebra.
  • Learn about projections in vector spaces and their applications.
  • Investigate the calculation of volumes for other geometric shapes using linear algebra.
USEFUL FOR

Students of linear algebra, educators teaching vector calculus, and anyone interested in understanding geometric interpretations of vector operations.

Sheneron
Messages
360
Reaction score
0

Homework Statement



Show that the volume of a parallelepiped having u,v, and w as adjacent sides is given by abs(u*(vXw)).

(The star means dot product)

I am not really sure how to solve this problem. I was thinking that Volume would equal norm(u)+norm(v)+norm(w), but I couldn't figure out anywhere to go from there. Can someone help me start this problem. Thanks.
 
Physics news on Phys.org
First you should realize the dot product of 2 vectors is also the area of a parallelogram. Then you should note that the height of the parallelepiped is the projection of the vertical line to the line orthagonal (this should give you a hint) of the 2 vectors.
 
Awesome, thanks
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 13 ·
Replies
13
Views
5K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
1
Views
2K
Replies
1
Views
4K
  • · Replies 6 ·
Replies
6
Views
2K
Replies
15
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
4K
  • · Replies 5 ·
Replies
5
Views
2K