Chapter 11: Problem 12
Find the component form of the vector. The sum of \(\overrightarrow{A B}\) and \(\overrightarrow{C D},\) where \(A=(1,-1), B=(2,0)\) \(C=(-1,3),\) and \(D=(-2,2)\).
Short Answer
Expert verified
The component form of the sum is (0, 0).
Step by step solution
01
Calculate the Components of Vector AB
The components of vector \( \overrightarrow{AB} \) are calculated using the formula \[ \overrightarrow{AB} = (B_x - A_x, B_y - A_y) \] Given points \( A = (1, -1) \) and \( B = (2, 0) \), substitute these into the formula: \[ \overrightarrow{AB} = (2 - 1, 0 + 1) = (1, 1) \] So, the vector \( \overrightarrow{AB} \) is \( (1, 1) \).
02
Calculate the Components of Vector CD
The components of vector \( \overrightarrow{CD} \) are calculated using the formula \[ \overrightarrow{CD} = (D_x - C_x, D_y - C_y) \] Given points \( C = (-1, 3) \) and \( D = (-2, 2) \), substitute these into the formula: \[ \overrightarrow{CD} = (-2 + 1, 2 - 3) = (-1, -1) \] So, the vector \( \overrightarrow{CD} \) is \( (-1, -1) \).
03
Add the Vector Components
To add the vectors \( \overrightarrow{AB} \) and \( \overrightarrow{CD} \), simply add their respective components: \[ \overrightarrow{AB} + \overrightarrow{CD} = ((1) + (-1), (1) + (-1)) \] This results in \[ \overrightarrow{AB} + \overrightarrow{CD} = (0, 0) \] Thus, the component form of the resulting vector is \( (0, 0) \).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Understanding Component Form
Finding the component form of a vector involves a simple yet crucial concept in vector mathematics. This form represents a vector with its individual components along the x and y axes, denoting the movement from the origin along each axis. When given points, such as
- Point A: (1, -1)
- Point B: (2, 0)
- For the x-component: (B_x - A_x) = 2 - 1 = 1
- For the y-component: (B_y - A_y) = 0 + 1 = 1
Exploring Vector Components
Once the component form of a vector is determined, each of these elements is known as a vector component. For instance, when examining vector \( \overrightarrow{AB} \), the numbers (1, 1) tell you several things. First, the x-component is 1, meaning the vector moves one unit in the positive x-direction. Similarly, the y-component of the vector is also 1, indicating it moves one unit in the positive y-direction.
By using similar calculations for vector \( \overrightarrow{CD} \) with starting point (-1, 3) and endpoint (-2, 2), you derive the components: (-1, -1). Each of these negative values shows a movement in the opposite direction along both axes. The x-component of -1 indicates a move one unit left along the x-axis, and the y-component of -1 denotes a move one unit down along the y-axis. Comprehending these components provides essential insights into the vector's true nature and direction.
By using similar calculations for vector \( \overrightarrow{CD} \) with starting point (-1, 3) and endpoint (-2, 2), you derive the components: (-1, -1). Each of these negative values shows a movement in the opposite direction along both axes. The x-component of -1 indicates a move one unit left along the x-axis, and the y-component of -1 denotes a move one unit down along the y-axis. Comprehending these components provides essential insights into the vector's true nature and direction.
Applications in Mathematics Education
Vector mathematics, especially concepts like vector addition and component form, plays a critical role in mathematics education. Learning about vectors not only enhances students' understanding of geometry and physics but also builds a foundation for more advanced mathematical concepts. Here are a few key aspects:
- Vector addition helps in understanding combining forces, velocities, and movements
- Recognizing vector components arms students with the ability to visualize directions and magnitudes in a two-dimensional plane