Math Problem Statement
A woman walks from her house to her neighbor’s house, and back to her house. Her position has been logged by an app on her phone every 60 seconds. Here is a table of her motion data.
Graph her walking data in a Displacement vs. Time graph on a separate piece of graph paper.
Calculate the average velocity at 3 different time blocks during the trip using the graph you made.
Distance from House (m)
Time (s)
0
0
84
60
160
120
245
180
154
240
90
300
6
360
Solution
To address the problem, here’s the step-by-step process you should follow:
1. Plot the Displacement vs. Time Graph:
- X-axis: Time (in seconds) ranging from 0 to 360 seconds.
- Y-axis: Displacement from the house (in meters) ranging from 0 to 245 meters.
Points to plot:
- (0, 0)
- (60, 84)
- (120, 160)
- (180, 245)
- (240, 154)
- (300, 90)
- (360, 6)
2. Calculate the Average Velocity in 3 Different Time Blocks:
Average velocity in a given time block is calculated using the formula:
Let's calculate the average velocity for three time blocks:
Time Block 1: From 0s to 180s
- Initial displacement: 0 meters
- Final displacement: 245 meters
- Change in displacement: meters
- Change in time: seconds
Time Block 2: From 180s to 300s
- Initial displacement: 245 meters
- Final displacement: 90 meters
- Change in displacement: meters (indicating a return towards the house)
- Change in time: seconds
Time Block 3: From 300s to 360s
- Initial displacement: 90 meters
- Final displacement: 6 meters
- Change in displacement: meters
- Change in time: seconds
Summary of Average Velocities:
- 0s to 180s: 1.36 m/s (away from the house)
- 180s to 300s: -1.29 m/s (toward the house)
- 300s to 360s: -1.4 m/s (toward the house)
Would you like further clarification or any additional help?
Here are 5 related questions:
- How would you describe the woman’s journey based on the displacement vs. time graph?
- What does a negative average velocity signify in this context?
- How would the graph look if the woman had walked at a constant velocity?
- Can you determine the maximum speed during the trip from the data?
- How would the displacement vs. time graph differ from a distance vs. time graph?
Tip: When plotting a displacement vs. time graph, pay close attention to the slope of the line. The slope directly represents the velocity.
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Math Problem Analysis
Mathematical Concepts
Physics
Kinematics
Average Velocity
Formulas
Average Velocity formula: \( \text{Average Velocity} = \frac{\text{Change in Displacement}}{\text{Change in Time}} \)
Theorems
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Suitable Grade Level
Grades 9-12
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