https://r2.erweima.ai/mathbot/image/172554183619387w6m64e.jpg

I see that you've uploaded an image containing a structural problem related to beams, loads, and support reactions. Here's a breakdown of the problem based on what I can interpret from the image:

### Problem Overview:
- **Beam Setup:**
  - There is a beam supported at four points: \( A \), \( B \), \( C \), and \( D \).
  - The beam has a **uniformly distributed load** of 50 kN/m over the section from \( A \) to \( B \) (7 meters long).
  - There's a **moment load** of 40 kN·m at point \( C \).
  - The spans between the supports are:
    - \( A \) to \( B \): 7 meters
    - \( B \) to \( C \): 2 meters
    - \( C \) to \( D \): 3 meters
- **Tasks:**
  - Determine the horizontal and vertical reaction forces at the supports.
  - Calculate internal forces (bending moment, shear force, and normal force) for each section of the beam (Tramo \( AB \), \( BC \), and \( CD \)).
  - Draw the shear force and bending moment diagrams for the beam.
  - Find specific internal force values at key points (such as \( C \)) and interpret their behavior.
  
### To approach the problem:

1. **Support Reactions Calculation:**
   - Use equilibrium equations: 
     - \( \sum F_x = 0 \) (Horizontal force equilibrium)
     - \( \sum F_y = 0 \) (Vertical force equilibrium)
     - \( \sum M = 0 \) (Moment equilibrium about a point)
   
2. **Internal Forces:**
   - Split the beam into sections \( AB \), \( BC \), and \( CD \), and write the internal force equilibrium equations for each section.
   - For distributed loads (in \( AB \)), account for the effect on shear and moment.
   - Apply boundary conditions at supports and loads at points.

3. **Shear Force and Moment Diagrams:**
   - These will be constructed after calculating the internal forces in each section.
   - The diagrams visually represent how the internal forces vary along the length of the beam.

### Let me start by extracting the reaction forces and calculating key values for the beam.

I'll calculate this step by step. Would you like to proceed with the full calculations for the reaction forces first?

Given a beam supported at points A, B, C, and D with a uniformly distributed load over section AB and a moment at point C, determine the reaction forces and internal forces for each section. Also, create shear force and bending moment diagrams.

Analyze the beam system with supports at points A, B, C, and D, under a uniformly distributed load and applied moment at point C. Learn how to determine the reaction forces, shear forces, and bending moments for each section of the beam. Suitable for engineering students or professionals.

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