Math Problem Statement

The maximum value of magnitude of ) B A ( r r  is :

Solution

To solve for the maximum value of the magnitude of BA\mathbf{B} - \mathbf{A}, where B\mathbf{B} and A\mathbf{A} are vectors, we will consider the following approach:

Step-by-step process:

  1. Define the vectors: Let A\mathbf{A} and B\mathbf{B} be two vectors. The vector BA\mathbf{B} - \mathbf{A} represents the vector that points from A\mathbf{A} to B\mathbf{B}.

  2. Magnitude of a vector: The magnitude (or length) of a vector V=BA\mathbf{V} = \mathbf{B} - \mathbf{A} is given by: BA=(BxAx)2+(ByAy)2+(BzAz)2|\mathbf{B} - \mathbf{A}| = \sqrt{(B_x - A_x)^2 + (B_y - A_y)^2 + (B_z - A_z)^2} where Bx,By,BzB_x, B_y, B_z and Ax,Ay,AzA_x, A_y, A_z are the components of B\mathbf{B} and A\mathbf{A}, respectively.

  3. Maximizing the magnitude: The magnitude is maximized when the vectors B\mathbf{B} and A\mathbf{A} are pointing in opposite directions. In that case, the angle θ\theta between them is 180°, and the distance between the points represented by the vectors is greatest.

Thus, the maximum value of BA|\mathbf{B} - \mathbf{A}| is equal to the sum of the magnitudes of A\mathbf{A} and B\mathbf{B}: BAmax=B+A|\mathbf{B} - \mathbf{A}|_{\text{max}} = |\mathbf{B}| + |\mathbf{A}|

Final Answer:

The maximum value of BA|\mathbf{B} - \mathbf{A}| is A+B|\mathbf{A}| + |\mathbf{B}|.

Would you like more details or further clarification on this?


Here are 5 related questions for further understanding:

  1. How do you calculate the magnitude of a vector in a 2D coordinate system?
  2. What is the geometric interpretation of subtracting one vector from another?
  3. How does the angle between two vectors affect the magnitude of their difference?
  4. Can the magnitude of BA\mathbf{B} - \mathbf{A} ever be negative? Why or why not?
  5. How would you find the maximum value of BA|\mathbf{B} - \mathbf{A}| if the vectors were given in polar coordinates?

Tip: The dot product between two vectors can help determine the angle between them, which is useful when calculating vector differences.

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Math Problem Analysis

Mathematical Concepts

Vector Algebra
Magnitude of Vectors
Vector Subtraction

Formulas

Magnitude of a vector |V| = sqrt(Vx^2 + Vy^2 + Vz^2)
Maximum magnitude of vector difference |B - A|max = |A| + |B|

Theorems

Properties of Vector Subtraction
Triangle Inequality in Vector Spaces

Suitable Grade Level

Grades 10-12