Ap Previous content resource ound has a mass of 136 kg and a radius of 1.60 m and it is rotating with an angular velocity of 0.590 rev/s. What is its angular velocity after a 19.0-kg child gets onto it by grabbing its outer edge? The child is initially at rest. 0.462 rpm Submit Answer Incorrect. Tries 1/10 Previous Tries
Ap Previous content resource ound has a mass of 136 kg and a radius of 1.60 m and it is rotating with an angular velocity of 0.590 rev/s. What is its angular velocity after a 19.0-kg child gets onto it by grabbing its outer edge? The child is initially at rest. 0.462 rpm Submit Answer Incorrect. Tries 1/10 Previous Tries
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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
Transcribed Image Text:**Problem Statement:**
A playground roundabout has a mass of 136 kg and a radius of 1.60 m and it is rotating with an angular velocity of 0.590 revolutions per second (rev/s). What is its angular velocity after a 19.0 kg child gets onto it by grabbing its outer edge? The child is initially at rest.
**User Input:**
- Angular Velocity: 0.462 revolutions per minute (rpm)
**Feedback:**
- Response: Incorrect.
- Attempts: 1 out of 10
**Additional Options:**
- Link: Previous Tries
---
**Explanation:**
The problem involves the conservation of angular momentum. Initially, the roundabout is spinning with a certain angular velocity. When the child, who is initially at rest, gets onto the roundabout, the system's total angular momentum must be conserved.
**Steps for Solution:**
1. **Identify Initial Conditions:**
- Mass of roundabout = 136 kg
- Radius of roundabout = 1.60 m
- Initial angular velocity = 0.590 rev/s
2. **Include the Child's Mass:**
- Mass of child = 19.0 kg
3. **Apply Conservation of Angular Momentum:**
- \( L_{initial} = L_{final} \)
- \( I_{roundabout} \times \omega_{initial} = (I_{roundabout} + I_{child}) \times \omega_{final} \)
4. **Solve for Final Angular Velocity:**
- Convert units and calculate accordingly.
This exercise helps reinforce concepts of rotational motion and conservation laws in physics.
Expert Solution
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