Math Problem Statement
Suppose you walk 11.5 m in a direction exactly 15° south of west then you walk 24 m in a direction exactly 44° west of north.
Solution
To solve this problem, we can break down the two displacements into their respective components and then find the resultant displacement.
Step 1: Breaking the displacements into components
We will use trigonometry to split each displacement into x (horizontal) and y (vertical) components.
Displacement 1: 11.5 m, 15° south of west
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Since this direction is south of west, the x-component will be negative (west is negative x-direction) and the y-component will also be negative (south is negative y-direction).
After calculation, the components are:
Displacement 2: 24 m, 44° west of north
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For this displacement, the x-component will be negative (west) and the y-component will be positive (north).
Step 2: Summing the components
Now, sum the x and y components to get the total displacement.
Step 3: Resultant displacement
To find the magnitude of the resultant displacement, use the Pythagorean theorem:
And to find the direction of the resultant displacement (relative to the positive x-axis):
Let me calculate that.The magnitude of the resultant displacement is approximately 31.24 meters, and the direction is 152.78°, measured counterclockwise from the positive x-axis (or west of north).
Do you have any further questions or would you like more details?
Here are five related questions to expand the topic:
- How would the resultant displacement change if the second walk were longer?
- How can we use vector addition to solve similar problems?
- What is the significance of direction in determining vector components?
- How would the displacement differ if we started by walking north of west instead?
- How could you find the total time taken if the speed for each walk was given?
Tip: Always remember to consider both magnitude and direction when working with vectors.
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Vector Addition
Coordinate Geometry
Formulas
x-component = displacement × cos(angle)
y-component = displacement × sin(angle)
Resultant displacement = √(x_total^2 + y_total^2)
Direction of resultant displacement = tan⁻¹(y_total / x_total)
Theorems
Pythagorean Theorem
Trigonometric Ratios
Suitable Grade Level
Grades 9-12
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