Resultant forces

• What should you be able to describe by the end of the video?

  Resultant force
• What is the focus of this video?

  Calculating resultant forces
• What is a force defined as?

  A push or pull on an object
• Why are forces considered vector quantities?

  They have both magnitude and direction
• If a man pushes a box with 20 Newtons right and friction is 10 Newtons left, what is the resultant force?

  10 Newtons to the right
• What does the resultant force represent?

  A single force equivalent to all original forces
• How do you calculate the resultant force when two forces act in opposite directions?

  Subtract the smaller force from the larger
• What is the driving force of the car in the example?

  10,000 Newtons to the left
• What is the total force acting to the right in the car example?

  9,000 Newtons
• What is the resultant force on the car after calculating the forces?

  1,000 Newtons to the left
• What force does the skydiver experience downwards?

  800 Newtons
• What does it mean when forces are balanced?

  The resultant force is zero
• How is a Freebody diagram represented?

  As a point with arrows for forces
• What does the length of the arrow in a Freebody diagram indicate?

  The size of the force
• What does altitude refer to in the context of the airplane?

  The height above the ground
• What force acts upwards on the airplane?

  Lift
• What forces must be balanced for the airplane to maintain constant velocity?

  Forward and backward forces
• What are the steps to calculate resultant forces in a scenario?

  1. Identify all forces acting on the object.
  2. Determine the direction of each force.
  3. Add forces acting in the same direction.
  4. Subtract forces acting in opposite directions.
  5. The result is the resultant force.
• What are the key components of a Freebody diagram?

  • Object represented as a point
  • Forces drawn as arrows
  • Length of arrows indicates force size
  • Direction of arrows indicates force direction