Vector Integration Homework: Evaluate Integrals A⋅B & A×B

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SUMMARY

The discussion focuses on evaluating vector integrals involving the vector functions A(t) = t i - t² j + (t - 1) k and B(t) = 2t² i + 6t k. Participants confirm that to solve part (a), the dot product A ⋅ B should be calculated first, followed by integration over the interval [0, 2]. For part (b), the cross product A × B is computed using a determinant matrix setup, which is then integrated over the same interval. The correct application of these vector operations leads to the final solutions for both integrals.

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  • Understanding of vector functions and their components
  • Knowledge of dot product and cross product operations
  • Familiarity with definite integrals in calculus
  • Ability to manipulate matrices for cross product calculations
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  • Review vector calculus concepts, focusing on dot and cross products
  • Practice evaluating definite integrals of vector functions
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Homework Statement



If A(t) = t i - t2 j + (t - 1) k and B(t) = 2t2 i + 6t k, evaluate (a) \int^{2}_{0}A \cdot B dt, (b) \int^{2}_{0}A \times B dt.

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The Attempt at a Solution


Help me please because I don't know how to solve this problem. Thanks!

Looking forward to your responses.
 
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Take the dot product for the first and then integrate and take the cross product for the second. Dot product remember is Ai*Bi + Aj*Bj + Ak*Bk. For cross product, set up a matrix with i j k in row one followed by the i j k of a in row 2 and i j k of b in row 3
 
Dustinsfl said:
Take the dot product for the first and then integrate and take the cross product for the second. Dot product remember is Ai*Bi + Aj*Bj + Ak*Bk. For cross product, set up a matrix with i j k in row one followed by the i j k of a in row 2 and i j k of b in row 3

Thanks! I've got the answer..:smile:
 

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