Chapter 7: Problem 18
Find the vector \(P_{1} P_{2}\). Graph \(P_{1} P_{2}\) and its corresponding position vector. \(P_{1}(0,3), P_{2}(2,0)\)
Short Answer
Expert verified
The vector \( P_{1} P_{2} \) is \( (2, -3) \).
Step by step solution
01
Determine the components of the vector
To find the vector \( P_{1} P_{2} \), we need to subtract the coordinates of point \( P_{1} \) from the coordinates of point \( P_{2} \). The formula for the vector from \( P_{1}(x_1, y_1) \) to \( P_{2}(x_2, y_2) \) is \( (x_2 - x_1, y_2 - y_1) \). For our points, \( P_1(0, 3) \) and \( P_2(2, 0) \), the vector \( P_{1} P_{2} \) is given by: \( (2 - 0, 0 - 3) = (2, -3) \).
02
Graph the vector
Plot the points \( P_1(0, 3) \) and \( P_2(2, 0) \) on a coordinate plane. Then, draw an arrow from \( P_1 \) to \( P_2 \) to represent the vector \( P_{1} P_{2} \). This visual representation shows that the vector moves 2 units to the right and 3 units down from \( P_1 \) to \( P_2 \).
03
Identify the position vector
The position vector for \( P_{1} P_{2} \) is the same as the vector \( P_{1} P_{2} \) because it represents the change from the origin \((0,0)\) to the vector's terminal point. Therefore, the position vector is also \( (2, -3) \). Plot this vector starting from the origin, ending at the point (2, -3) on the graph. This shows the equivalent direction and magnitude that describes the movement from \( P_1 \) to \( P_2 \).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Vector Components
Vector components are a crucial part of understanding vectors in mathematics. They represent the differences in each coordinate direction between the start and end points of a vector.
For the vector between two points, say \( P_{1}(x_1, y_1) \) and \( P_{2}(x_2, y_2) \), the components are calculated by subtracting the coordinates of the starting point from the coordinates of the endpoint.
This is expressed as \( (x_2 - x_1, y_2 - y_1) \). In our example, the components of the vector \( P_{1} P_{2} \) are determined by the coordinates \( P_1(0, 3) \) and \( P_2(2, 0) \).
Thus, the vector components can be calculated as \( (2 - 0, 0 - 3) = (2, -3) \).
These components essentially tell us that the vector moves 2 units along the x-axis and -3 units along the y-axis.
This information provides a clear description of how one would get from one point to another on a 2D coordinate plane.
For the vector between two points, say \( P_{1}(x_1, y_1) \) and \( P_{2}(x_2, y_2) \), the components are calculated by subtracting the coordinates of the starting point from the coordinates of the endpoint.
This is expressed as \( (x_2 - x_1, y_2 - y_1) \). In our example, the components of the vector \( P_{1} P_{2} \) are determined by the coordinates \( P_1(0, 3) \) and \( P_2(2, 0) \).
Thus, the vector components can be calculated as \( (2 - 0, 0 - 3) = (2, -3) \).
These components essentially tell us that the vector moves 2 units along the x-axis and -3 units along the y-axis.
This information provides a clear description of how one would get from one point to another on a 2D coordinate plane.
Graphing Vectors
Graphing vectors is key for visualizing how they work and what they represent. A vector is depicted as an arrow on a coordinate plane, making it easy to see its direction and magnitude.
To graph a vector like \( P_{1} P_{2} \), you start by plotting the given points.
In this case, you'll plot \( P_1(0, 3) \) and \( P_2(2, 0) \). Next, draw an arrow starting from \( P_1 \) pointing towards \( P_2 \). This shows the vector's path and direction.
The arrow from \( P_1 \) to \( P_2 \) on the graph represents that the movement specified by the vector, moving 2 units right and 3 units down. This graphical representation helps in understanding vectors more intuitively.When graphing, remember:- Use a ruler or graphing tool for accuracy.- The tail of the vector is at \( P_1 \), and the arrowhead is at \( P_2 \).- This arrow also highlights the vector's length, demonstrating its magnitude.
To graph a vector like \( P_{1} P_{2} \), you start by plotting the given points.
In this case, you'll plot \( P_1(0, 3) \) and \( P_2(2, 0) \). Next, draw an arrow starting from \( P_1 \) pointing towards \( P_2 \). This shows the vector's path and direction.
The arrow from \( P_1 \) to \( P_2 \) on the graph represents that the movement specified by the vector, moving 2 units right and 3 units down. This graphical representation helps in understanding vectors more intuitively.When graphing, remember:- Use a ruler or graphing tool for accuracy.- The tail of the vector is at \( P_1 \), and the arrowhead is at \( P_2 \).- This arrow also highlights the vector's length, demonstrating its magnitude.
Position Vectors
Position vectors are vectors that originate from the origin \((0, 0)\) and point to a specific position on the plane.
They are used to show the position of a point relative to the origin, and they have the same components as the vector initially described. For the position vector corresponding to \( P_{1} P_{2} \), start it at the origin.
Draw it so it ends at the same terminal point as our original vector. Our vector was \( (2, -3) \), so the position vector also lives at the point \( (2, -3) \).
This equates to moving 2 units along the x-axis and -3 units along the y-axis from the origin.In essence, the position vector \( (2, -3) \) provides a simple way to describe the location of \( P_{2} \) starting from the point \( (0, 0) \) and shares the same magnitude and direction as the vector \( P_{1} P_{2} \).
They are used to show the position of a point relative to the origin, and they have the same components as the vector initially described. For the position vector corresponding to \( P_{1} P_{2} \), start it at the origin.
Draw it so it ends at the same terminal point as our original vector. Our vector was \( (2, -3) \), so the position vector also lives at the point \( (2, -3) \).
This equates to moving 2 units along the x-axis and -3 units along the y-axis from the origin.In essence, the position vector \( (2, -3) \) provides a simple way to describe the location of \( P_{2} \) starting from the point \( (0, 0) \) and shares the same magnitude and direction as the vector \( P_{1} P_{2} \).
- The magnitude is depicted by the length from \((0, 0)\) to \((2, -3)\).
- The direction shows how the point has traveled relative to the origin.