Resultant forced & Free body diagrams

• What is the purpose of free body diagrams?

  To show all the forces acting on a particular object.
• How do we represent forces in free body diagrams?

  Using force arrows that indicate both magnitude and direction.
• In a free body diagram of a plane, what does the thrust arrow represent?

  The forward force acting on the plane.
• What happens to forces acting in different directions in a free body diagram?

  Some forces will cancel each other out, affecting the resultant force.
• How is the magnitude of a force represented in a free body diagram?

  By the length of the force arrows.
• If a plane has a vertical force of 80,000 newtons up and 80,000 newtons down, what is the resultant force in the vertical direction?

  Zero newtons overall for the vertical component.
• How do you calculate the horizontal resultant force if there are 120,000 newtons to the right and 90,000 newtons to the left?

  By subtracting left from right, resulting in 30,000 newtons to the right.
• What is the overall resultant force when considering both vertical and horizontal components in the given example?

  30,000 newtons to the right.
• What would happen to the horizontal resultant force if air resistance increased to 120,000 newtons?

  The horizontal resultant force would be zero newtons.
• What does it mean for an object to be in equilibrium in the context of forces?

  It means that both the horizontal and vertical components are perfectly balanced with no resultant force acting on it.
• What are the key components of a free body diagram?

  • Force arrows representing magnitude and direction
  • Thrust, drag, weight, and lift forces for an object like a plane
  • Horizontal and vertical components to analyze resultant forces
• How do you determine the resultant force from multiple forces acting on an object?

  1. Analyze vertical forces separately
  2. Analyze horizontal forces separately
  3. Subtract opposing forces to find resultant in each direction
  4. Combine the resultant forces to find overall resultant force