The image depicts a biomechanical analysis of forces acting on a human arm while holding a weight. The diagram includes a simplified drawing of an arm with a free-body diagram.### Description:- **Arm Diagram**: - The arm is shown holding a box labeled "PHYSICS" with a mass \( m_b = 4.0 \, \text{kg} \). - The arm itself is marked with a mass \( m_s = 2.5 \, \text{kg} \). - The biceps muscle exerts a force \( F_B \) upwards. - The triceps muscle is also indicated, although it does not directly exert a force shown in the diagram. - The weight of the arm (\( w_a \)) acts downward at a distance of 16 cm from the elbow. - The weight of the box (\( w_b \)) acts downward at a distance of 38 cm from the elbow. - The force at the elbow joint (\( F_E \)) acts upward.- **Free-Body Diagram**: - Displays forces at play: - \( F_B \) is represented upwards. - \( w_a \) (weight of the arm) and \( w_b \) (weight of the box) are shown acting downwards. - \( F_E \), the force at the elbow joint, acts upwards.### Measurements:- **Distances** from the elbow: - Center of mass of the arm (CG) is 16 cm. - The box is held 38 cm from the elbow.### Purpose:The exercise is to verify that the force in the elbow joint is 407 N, as stated. This involves calculating the torques and forces involved in holding the weight steady.### Application:This type of analysis is crucial for understanding the mechanics of human movement and the stresses on joints during physical activities. It aids in designing ergonomic tools and preventing injuries.

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Answered: Verify that the force in the elbow…

Verify that the force in the elbow joint in the figure below is 407 N, as stated in the text. (Submit a file with a maximum size of 1 MB.)

College Physics

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ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

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Question

The image depicts a biomechanical analysis of forces acting on a human arm while holding a weight. The diagram includes a simplified drawing of an arm with a free-body diagram.

### Description:

- **Arm Diagram**:
- The arm is shown holding a box labeled "PHYSICS" with a mass \( m_b = 4.0 \, \text{kg} \).
- The arm itself is marked with a mass \( m_s = 2.5 \, \text{kg} \).
- The biceps muscle exerts a force \( F_B \) upwards.
- The triceps muscle is also indicated, although it does not directly exert a force shown in the diagram.
- The weight of the arm (\( w_a \)) acts downward at a distance of 16 cm from the elbow.
- The weight of the box (\( w_b \)) acts downward at a distance of 38 cm from the elbow.
- The force at the elbow joint (\( F_E \)) acts upward.

- **Free-Body Diagram**:
- Displays forces at play:
- \( F_B \) is represented upwards.
- \( w_a \) (weight of the arm) and \( w_b \) (weight of the box) are shown acting downwards.
- \( F_E \), the force at the elbow joint, acts upwards.

### Measurements:
- **Distances** from the elbow:
- Center of mass of the arm (CG) is 16 cm.
- The box is held 38 cm from the elbow.

### Purpose:
The exercise is to verify that the force in the elbow joint is 407 N, as stated. This involves calculating the torques and forces involved in holding the weight steady.

### Application:
This type of analysis is crucial for understanding the mechanics of human movement and the stresses on joints during physical activities. It aids in designing ergonomic tools and preventing injuries.

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