Find Magnitude of V1 X V2 When Vectors are Perpendicular

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Homework Help Overview

The problem involves calculating the magnitude of the cross product of two vectors, V1 and V2, given that they are perpendicular. The context is rooted in vector mathematics.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to apply the formula for the magnitude of the cross product, noting that the sine of 90 degrees equals 1. They express confusion over receiving an incorrect response despite their reasoning.
  • Some participants question the clarity of the problem statement, specifically whether the vectors are indeed described as perpendicular.
  • Others suggest that the issue may lie in how the answer is being submitted rather than the mathematical reasoning itself.

Discussion Status

The discussion is ongoing, with participants exploring the validity of the original poster's interpretation of the problem. There is a recognition of potential input errors, but no consensus has been reached regarding the mathematical approach.

Contextual Notes

The problem specifies that V1 and V2 are perpendicular, and there is a subsequent mention of a related question regarding parallel vectors, which results in a zero magnitude for the cross product.

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Homework Statement


V1 and V2 are different vectors with lengths V1 and V2 respectively. Find |V1 X V2| if V1 and V2 are perpendicular.

Homework Equations


V1 X V2 = |V1|*|V2|sin(Θ)

The Attempt at a Solution


Since sin(90) = 1, V1 X V2 = |V1|*|V2|.
When I input this answer it says its incorrect and the answer does not depend on V1 and V2. Is there something I'm missing?
 
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If the answer says that, are you certain the problem says perpendicular and not parallel? As formulated, you are correct.
 
Yes it says perpendicular. The next question asked for parallel which is zero.
 
It's probably a problem with inputting the answer. Thank you anyways.
 

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