(b) A 1 When is the velocity of the particle positive? When is it negative? When is the particle speeding up? When is it slowing down?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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**Graph Explanation:**

The graph displays the position \( s \) of a particle as a function of time \( t \). The horizontal axis represents time \( t \), while the vertical axis represents the position \( s \).

**Key Features of the Graph:**

- The curve starts at a positive position and initially decreases, reaching a value of zero around \( t = 1 \).
- After \( t = 1 \), the position becomes negative, reaching a minimum before increasing again.
- The curve shows a periodic undulating motion, indicative of a wave or oscillatory pattern.

**Questions and Answers:**

1. **When is the velocity of the particle positive?**
   - The velocity is positive when the slope of the graph (rate of change of \( s \)) is increasing, which occurs when the graph is moving upwards.

2. **When is it negative?**
   - The velocity is negative when the slope of the graph is decreasing, which occurs when the graph is moving downwards.

3. **When is the particle speeding up?**
   - The particle speeds up when the graph is moving away from the time axis (whether upward or downward), indicating an increase in the magnitude of velocity.

4. **When is it slowing down?**
   - The particle slows down when the graph approaches the time axis, indicating a decrease in the magnitude of velocity.
Transcribed Image Text:**Graph Explanation:** The graph displays the position \( s \) of a particle as a function of time \( t \). The horizontal axis represents time \( t \), while the vertical axis represents the position \( s \). **Key Features of the Graph:** - The curve starts at a positive position and initially decreases, reaching a value of zero around \( t = 1 \). - After \( t = 1 \), the position becomes negative, reaching a minimum before increasing again. - The curve shows a periodic undulating motion, indicative of a wave or oscillatory pattern. **Questions and Answers:** 1. **When is the velocity of the particle positive?** - The velocity is positive when the slope of the graph (rate of change of \( s \)) is increasing, which occurs when the graph is moving upwards. 2. **When is it negative?** - The velocity is negative when the slope of the graph is decreasing, which occurs when the graph is moving downwards. 3. **When is the particle speeding up?** - The particle speeds up when the graph is moving away from the time axis (whether upward or downward), indicating an increase in the magnitude of velocity. 4. **When is it slowing down?** - The particle slows down when the graph approaches the time axis, indicating a decrease in the magnitude of velocity.
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