resultant forces

• What are free body diagrams used for?

  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
• What forces would be represented in a free body diagram of a plane flying through the sky?

  • Thrust (forward)
  • Air resistance or drag (backward)
  • Weight (downward)
  • Lift (upward)
• What does the length of the arrows in a free body diagram represent?

  The magnitude of the force
• What is the resultant force on an object?

  The overall force acting on an object after considering all individual forces
• How do you calculate the resultant force in vertical and horizontal directions?

  By looking at the forces separately and calculating their overall size and direction
• In the example given, what is the vertical resultant force when there is an upward force of 80,000 newtons and a downward force of 80,000 newtons?

  0 newtons
• What is the horizontal resultant force when there is a force of 120,000 newtons to the right and 90,000 newtons to the left?

  30,000 newtons to the right
• What happens to the resultant force if air resistance equals 120,000 newtons in the horizontal component?

  The horizontal resultant force becomes 0 newtons
• What does it mean when both the horizontal and vertical components are perfectly balanced?

  The object is in equilibrium
• What is the key takeaway from the video about free body diagrams?

  They help visualize and calculate the resultant forces acting on an object