After they rotate awhile, the princesses then pull themselves using their arms along the rod until they are separated by only 1.0 m. 4. After they come closer together as described above, what is their angular speed? Hint: think about angular momentum. 5. What is the kinetic energy of the two-princess system now? 6. What provided the energy for their increased kinetic energy?

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The first three have been answered as 

1. 0 m/s 

2. 0.93 rad/sec 

3. 107.8 J 

 

**Title: Analyzing Rotational Motion of Two Skaters Using a Massless Rod**

**Introduction:**
Imagine you're watching a scene on a streaming service involving two characters, Ariel and Aurora, each with a mass of 55 kg. They glide on ice in opposite directions at a speed of 1.4 m/s, holding onto the ends of a long massless rod.

**Diagram Explanation:**
In the diagram, two skaters are depicted from a top view:

- **Ariel** moves horizontally to the left at 1.4 m/s.
- **Aurora** moves horizontally to the right at 1.4 m/s.
- The path between them measures 3.0 meters, marked by the rod they jointly hold.

**Scenario:**
Both skaters eventually grab the ends of the rod and begin rotating around the rod's center. Assume a frictionless interaction between the skaters and ice. 

**Questions:**

1. **Translational (Linear) Speed of the Two-Princess System:**
   - Calculate the movement speed of the center-of-mass (c.o.m.) of the system under symmetry conditions.

2. **Angular Speed of the Princesses:**
   - Determine the angular speed at which the skaters rotate around the rod’s center.

3. **Kinetic Energy of the Two-Princess System:**
   - Compute the kinetic energy present in the system as the skaters spin with the rod.

**Note:** Continued analysis and further questions can be found on the second page.
Transcribed Image Text:**Title: Analyzing Rotational Motion of Two Skaters Using a Massless Rod** **Introduction:** Imagine you're watching a scene on a streaming service involving two characters, Ariel and Aurora, each with a mass of 55 kg. They glide on ice in opposite directions at a speed of 1.4 m/s, holding onto the ends of a long massless rod. **Diagram Explanation:** In the diagram, two skaters are depicted from a top view: - **Ariel** moves horizontally to the left at 1.4 m/s. - **Aurora** moves horizontally to the right at 1.4 m/s. - The path between them measures 3.0 meters, marked by the rod they jointly hold. **Scenario:** Both skaters eventually grab the ends of the rod and begin rotating around the rod's center. Assume a frictionless interaction between the skaters and ice. **Questions:** 1. **Translational (Linear) Speed of the Two-Princess System:** - Calculate the movement speed of the center-of-mass (c.o.m.) of the system under symmetry conditions. 2. **Angular Speed of the Princesses:** - Determine the angular speed at which the skaters rotate around the rod’s center. 3. **Kinetic Energy of the Two-Princess System:** - Compute the kinetic energy present in the system as the skaters spin with the rod. **Note:** Continued analysis and further questions can be found on the second page.
**Physics Exercise: Understanding Angular Momentum and Kinetic Energy**

**Scenario Overview:**
After a period of rotation, the princesses pull themselves closer along a rod, reducing the separation between them to 1.0 m.

**Exploration Questions:**

4. *Angular Speed*: Once the princesses have moved closer to a separation of 1.0 m, determine their new angular speed. Consider the principle of conservation of angular momentum.

5. *Kinetic Energy*: Calculate the kinetic energy of the two-princess system in this new arrangement.

6. *Source of Energy*: Identify what provided the energy for the increased kinetic energy observed in the system.
Transcribed Image Text:**Physics Exercise: Understanding Angular Momentum and Kinetic Energy** **Scenario Overview:** After a period of rotation, the princesses pull themselves closer along a rod, reducing the separation between them to 1.0 m. **Exploration Questions:** 4. *Angular Speed*: Once the princesses have moved closer to a separation of 1.0 m, determine their new angular speed. Consider the principle of conservation of angular momentum. 5. *Kinetic Energy*: Calculate the kinetic energy of the two-princess system in this new arrangement. 6. *Source of Energy*: Identify what provided the energy for the increased kinetic energy observed in the system.
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