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Transcribed Image Text:The image contains handwritten notes related to velocity graph analysis with focus on understanding Lu's walk. Here is the transcribed content:
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**2. Describe the sort of walk Lu must have taken to have this velocity graph.** Be sure your description explains the physical aspects of the fact that her velocity is 0 at t=15 minutes and the fact that her velocity is negative for the second half of her walk. Also make sure to mention when Lu was speeding up and when she was slowing down.
**b. Find Lu's average acceleration over the 30-minute walk.** Was the acceleration constant over the duration of the walk?
**c. What was Lu's average velocity over her entire walk?**
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There is no graph or diagram included in the image. The text focuses on describing motion based on a hypothetical velocity graph.
Transcribed Image Text:While Lu is walking along a straight north-south forest path, her velocity in feet per minute after \( t \) minutes is given by the following graph. Suppose the "positive" direction is north.
**Lu’s Velocity**
The graph represents Lu's velocity (\( v \)) as a function of time (\( t \)), where:
- The vertical axis (labeled \( v \)) measures velocity in feet per minute, ranging from -200 to 200.
- The horizontal axis (labeled \( t \)) measures time in minutes, from 0 to 30.
**Graph Description:**
- The velocity starts at 200 feet per minute at \( t = 0 \).
- The velocity decreases linearly, crossing the horizontal axis (velocity = 0) at around \( t = 15 \) minutes.
- The velocity continues to decrease, reaching -200 feet per minute at \( t = 30 \).
This indicates that Lu's motion begins heading north at a velocity of 200 feet/minute, slows down to a stop at 15 minutes, and then reverses direction (heading south) with increasing speed, reaching -200 feet/minute by 30 minutes.
Expert Solution
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Step 1
a. Lu was running in a straight line in the positive x- axis with a decreasing velocity. At time t=15 min he stops and then again starts running with increasing velocity but in opposite direction.
In the first half i.e. before 15 min Lu is slowing down and at the second half i.e. after 15 min Lu is speeding up
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