Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter5: More Applications Of Newton’s Laws
Section: Chapter Questions
Problem 1CQ: A car is moving forward slowly and is speeding up. A student claims that the car exerts a force on...
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Question
![### Finding the Magnitude and Direction of the Resultant of Five Concurrent Forces
#### Problem Statement
Find the magnitude and direction of the resultant of the five concurrent forces acting on a bolt.
#### Diagram Analysis
![Five concurrent forces acting on a bolt](Fig. P2-54)
In the diagram (Fig. P2-54), five forces act on a bolt at various angles. The forces and their respective angles from the horizontal axis are as follows:
- **Force F1:**
- Magnitude: 80 N
- Angle: 27° below the negative x-axis
- **Force F2:**
- Magnitude: 400 N
- Angle: 22° below the negative x-axis
- **Force F3:**
- Magnitude: 150 N
- Angle: 46° above the negative y-axis
- **Force F4:**
- Magnitude: 300 N
- Angle: 45° above the positive x-axis
- **Force F5:**
- Magnitude: 250 N
- Angle: 18° below the positive x-axis
These forces create various directional components that need to be resolved into x and y components to find the resultant force.
### Method to Find Resultant Force
1. **Resolve all forces into x and y components:**
- For each force \( F_i \):
- \( F_{ix} = F_i \cos(\theta_i) \)
- \( F_{iy} = F_i \sin(\theta_i) \)
where \( \theta_i \) is the angle the force makes with the horizontal axis.
2. **Summing Components:**
- Sum all the x-components to get the total x-component \( F_{Rx} \):
\[
F_{Rx} = \sum (F_{ix})
\]
- Sum all the y-components to get the total y-component \( F_{Ry} \):
\[
F_{Ry} = \sum (F_{iy})
\]
3. **Calculate Magnitude of Resultant Force:**
\[
F_R = \sqrt{F_{Rx}^2 + F_{Ry}^2}
\]
4. **Find Direction of Resultant Force:**
- The angle \( \theta_R \) can be found using:
\[](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2432691a-c29a-4a02-b85a-93b716867369%2Fc128de80-67ea-46eb-8cf6-de7f159d7fdf%2Fcuawjci_processed.png&w=3840&q=75)
Transcribed Image Text:### Finding the Magnitude and Direction of the Resultant of Five Concurrent Forces
#### Problem Statement
Find the magnitude and direction of the resultant of the five concurrent forces acting on a bolt.
#### Diagram Analysis
![Five concurrent forces acting on a bolt](Fig. P2-54)
In the diagram (Fig. P2-54), five forces act on a bolt at various angles. The forces and their respective angles from the horizontal axis are as follows:
- **Force F1:**
- Magnitude: 80 N
- Angle: 27° below the negative x-axis
- **Force F2:**
- Magnitude: 400 N
- Angle: 22° below the negative x-axis
- **Force F3:**
- Magnitude: 150 N
- Angle: 46° above the negative y-axis
- **Force F4:**
- Magnitude: 300 N
- Angle: 45° above the positive x-axis
- **Force F5:**
- Magnitude: 250 N
- Angle: 18° below the positive x-axis
These forces create various directional components that need to be resolved into x and y components to find the resultant force.
### Method to Find Resultant Force
1. **Resolve all forces into x and y components:**
- For each force \( F_i \):
- \( F_{ix} = F_i \cos(\theta_i) \)
- \( F_{iy} = F_i \sin(\theta_i) \)
where \( \theta_i \) is the angle the force makes with the horizontal axis.
2. **Summing Components:**
- Sum all the x-components to get the total x-component \( F_{Rx} \):
\[
F_{Rx} = \sum (F_{ix})
\]
- Sum all the y-components to get the total y-component \( F_{Ry} \):
\[
F_{Ry} = \sum (F_{iy})
\]
3. **Calculate Magnitude of Resultant Force:**
\[
F_R = \sqrt{F_{Rx}^2 + F_{Ry}^2}
\]
4. **Find Direction of Resultant Force:**
- The angle \( \theta_R \) can be found using:
\[
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VIEWStep 4: Calculation of components of force F2.
VIEWStep 5: Calculation of components of force F3.
VIEWStep 6: Calculation of components of force F4.
VIEWStep 7: Calculation of components of force F5.
VIEWStep 8: Calculation of magnitude and direction of resultant force.
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