From the top figure, what is the final velocity of the 5 kg ball? 「- (o+ Snる (1m " (4) V, () 44- &v(os日+sn'6) O 11.9 10.1 O 6.7 O8.4

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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### Problem Statement
"From the top figure, what is the final velocity of the 5 kg ball?"

### Diagrams and Equations
The board presents a scenario involving two balls and related equations:

1. **Context:**
   - A 5 kg ball moving at 12 m/s collides with a 3 kg ball moving at 4 m/s.
   - The angles given for the post-collision velocities:
     - 5 kg ball moves at \(30^\circ\).
     - 3 kg ball moves at \(45^\circ\).

2. **Equations:**
   - \(\cos^2 \theta + \sin^2 \theta = 1\) - Basic trigonometric identity.
   - Given relation: 
     \[
     44 = 8V^2(\cos^2 \theta + \sin^2 \theta)
     \]
   - Simplified to find velocity \(V\): 
     \[
     V = \sqrt{\frac{44}{8}}
     \]

### Multiple Choice Options
- 11.9
- 10.1
- 6.7
- 8.4
- 14.6

### Diagram Explanation
The diagrams indicate initial velocities and directions of the balls before and after the collision, along with the necessary vector components to apply conservation laws.

### Solution Approach
Using the conservation of momentum and kinetic energy principles, one can derive the final velocity \(V\) of the 5 kg ball using the provided equations and check against the given answers.
Transcribed Image Text:### Problem Statement "From the top figure, what is the final velocity of the 5 kg ball?" ### Diagrams and Equations The board presents a scenario involving two balls and related equations: 1. **Context:** - A 5 kg ball moving at 12 m/s collides with a 3 kg ball moving at 4 m/s. - The angles given for the post-collision velocities: - 5 kg ball moves at \(30^\circ\). - 3 kg ball moves at \(45^\circ\). 2. **Equations:** - \(\cos^2 \theta + \sin^2 \theta = 1\) - Basic trigonometric identity. - Given relation: \[ 44 = 8V^2(\cos^2 \theta + \sin^2 \theta) \] - Simplified to find velocity \(V\): \[ V = \sqrt{\frac{44}{8}} \] ### Multiple Choice Options - 11.9 - 10.1 - 6.7 - 8.4 - 14.6 ### Diagram Explanation The diagrams indicate initial velocities and directions of the balls before and after the collision, along with the necessary vector components to apply conservation laws. ### Solution Approach Using the conservation of momentum and kinetic energy principles, one can derive the final velocity \(V\) of the 5 kg ball using the provided equations and check against the given answers.
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