What's Happening When Velocity Changes? Why? We have all traveled in vehicles as they speed up, slow down, or travel steadily along a road. In this activity we will explore the ways a physicist thinks about, analyzes, and represents these types of motion. Model 1 - Two skateboarders on a track Stopwatch Time = 0 0 0 As you work through the following questions, be sure to follow your team role(s). 0 1 Stopwatch Time = 1 second 0 E 1 0 1 2 3 1 2 Stopwatch Time = 2 seconds 1 3 2 3 4 4 Stopwatch Time = 3 seconds 2 4 2 3 4 3 5 6 7 8 9 10 11 12 13 14 15 16 Position from starting line (meters) Stopwatch Time = 4 seconds. 5 6 7 8 9 10 11 Position from starting line (meters) 4 KEY A Skateboarder A B=Skateboarder B 9 5 6 7 8 10 11 12 13 14 15 16 Position from starting line (meters) 5 6 7 8 9 10 Position from starting line (meters) 11 12 13 14 15 16 5 6 7 8 9 10 11 Position from starting line (meters) 12 13 14 15 16 12 - velocity movement to the left + velocity = movement to the right B 13 14 15 16 POGIL® Conceptual Physics Activities Volume 1 | Designed to Support the NGSS Motion and Forces Standards Student CP Activity 4. Use the information in Model 1 to answer questions 1-10. Reach agreement with your team before writing down your consensus answers. 1. Which skateboarders are located at the starting line at Stopwatch Time = 0? a. Skateboarder A b. Skateboarder B c. Both skateboarders. 3. Look carefully at the positions of the two skateboarders as time passes. Circle the direction that the skateboarders are moving. 2. Highlight skateboard A in one color wherever you see it in Model 1. Highlight skateboard B in a different color. 127

Question

What's Happening When Velocity Changes? Why? We have all traveled in vehicles as they speed up, slow down, or travel steadily along a road. In this activity we will explore the ways a physicist thinks about, analyzes, and represents these types of motion. Model 1 - Two skateboarders on a track Stopwatch Time = 0 0 0 As you work through the following questions, be sure to follow your team role(s). 0 1 Stopwatch Time = 1 second 0 E 1 0 1 2 3 1 2 Stopwatch Time = 2 seconds 1 3 2 3 4 4 Stopwatch Time = 3 seconds 2 4 2 3 4 3 5 6 7 8 9 10 11 12 13 14 15 16 Position from starting line (meters) Stopwatch Time = 4 seconds. 5 6 7 8 9 10 11 Position from starting line (meters) 4 KEY A Skateboarder A B=Skateboarder B 9 5 6 7 8 10 11 12 13 14 15 16 Position from starting line (meters) 5 6 7 8 9 10 Position from starting line (meters) 11 12 13 14 15 16 5 6 7 8 9 10 11 Position from starting line (meters) 12 13 14 15 16 12 - velocity movement to the left + velocity = movement to the right B 13 14 15 16 POGIL® Conceptual Physics Activities Volume 1 | Designed to Support the NGSS Motion and Forces Standards Student CP Activity 4. Use the information in Model 1 to answer questions 1-10. Reach agreement with your team before writing down your consensus answers. 1. Which skateboarders are located at the starting line at Stopwatch Time = 0? a. Skateboarder A b. Skateboarder B c. Both skateboarders. 3. Look carefully at the positions of the two skateboarders as time passes. Circle the direction that the skateboarders are moving. 2. Highlight skateboard A in one color wherever you see it in Model 1. Highlight skateboard B in a different color. 127

Answer 1

Based on the given information in Model 1, the answers to the questions are as follows:

1. Which skateboarders are located at the starting line at Stopwatch Time = 0?
- Answer: Both skateboarders (c).

2. Highlight skateboard A in one color wherever you see it in Model 1. Highlight skateboard B in a different color.
- Answer: We cannot physically highlight the skateboarders, but we can identify Skateboarder A as the one on the left, and Skateboarder B as the one on the right.

3. Look carefully at the positions of the two skateboarders as time passes. Circle the direction that the skateboarders are moving.
- Answer: Skateboarder A is moving to the left, while Skateboarder B is moving to the right.

Answer 2

Based on the information given in Model 1, we can determine the answers to the following questions:

1. Which skateboarders are located at the starting line at Stopwatch Time = 0?
- Both skateboarders are located at the starting line.

2. Highlight skateboard A in one color wherever you see it in Model 1. Highlight skateboard B in a different color.
- Highlight skateboard A in one color and skateboard B in a different color.

3. Look carefully at the positions of the two skateboarders as time passes. Circle the direction that the skateboarders are moving.
- Skateboarder A is moving to the left (velocity movement to the left, indicated by the negative sign).
- Skateboarder B is moving to the right (positive velocity movement to the right).

Answer 3

To determine the answers to Questions 1-3, let's analyze the given information and Model 1.

1. Which skateboarders are located at the starting line at Stopwatch Time = 0?
To find the answer to this question, we need to look at the position from the starting line (meters) at Stopwatch Time = 0. In Model 1, both Skateboarder A and Skateboarder B have a position of 0 at Stopwatch Time = 0. Therefore, the correct answer is c. Both skateboarders.

2. Highlight skateboard A in one color wherever you see it in Model 1. Highlight skateboard B in a different color.
To answer this question, we need to locate Skateboarder A and Skateboarder B in Model 1. Skateboarder A can be found at positions 1, 2, 3, and 4. Highlight these positions in one color. Skateboarder B can be found at positions 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16. Highlight these positions in a different color.

3. Look carefully at the positions of the two skateboarders as time passes. Circle the direction that the skateboarders are moving.
To determine the direction of movement, we need to observe the changes in position as time passes. From Stopwatch Time = 0 to Stopwatch Time = 1 second, both Skateboarder A and Skateboarder B move from position 0 to position 1. From Stopwatch Time = 1 second to Stopwatch Time = 2 seconds, both skateboarders move from position 1 to position 2. From Stopwatch Time = 2 seconds to Stopwatch Time = 3 seconds, both skateboarders move from position 2 to position 3. From Stopwatch Time = 3 seconds to Stopwatch Time = 4 seconds, Skateboarder A moves from position 3 to position 4, while Skateboarder B remains at position 3.

Based on these movements, circle the direction of movement:
Skateboarder A: -> (movement to the right)
Skateboarder B: -> (movement to the right)

Please note that the given information does not provide velocity values explicitly, but we can interpret the movements of the skateboarders based on changes in positions over time.