vector diagrams

• What should you be able to do by the end of the video on vector diagrams?

  Use vector diagrams to calculate the resultant of two forces acting at an angle
• What is the term used for a single force that has the same effect as several forces acting on an object?

  Resultant force
• What is a vector diagram?

  A scale drawing showing the forces involved
• If 1 cm equals 1 Newton, how long should the arrow be for a force of 10 Newtons?

  10 cm long
• What angle should be measured between two forces in the example given?

  30°
• What is the purpose of creating a parallelogram in vector diagrams?

  To determine the resultant force from two vectors
• What is the length of the resultant vector in the first example?

  17.5 cm
• How do you convert the length of the resultant vector to Newtons in the first example?

  By using the scale of 1 cm equals 1 Newton
• If a force of 280 Newtons and a force of 320 Newtons are acting at an angle of 20°, what scale could you use for the vector diagram?

  1 cm for 40 Newtons
• What is the resultant force calculated in the second example?

  592 Newtons
• Why is it important to draw the vector diagram accurately in an exam?

  To ensure the resultant force is calculated correctly
• What are the steps to calculate the resultant force using vector diagrams?

  1. Draw the first force vector to scale.
  2. Measure the angle between the forces.
  3. Draw the second force vector to scale.
  4. Complete the parallelogram.
  5. Measure the resultant vector length.
  6. Convert the length to Newtons using the scale.
• What is the significance of using a protractor in vector diagrams?

  • To measure angles accurately
  • Ensures correct positioning of force vectors
  • Helps in constructing the parallelogram correctly
• What resources can be used for additional practice on vector diagrams?

  • Vision workbook
  • Online resources
  • Practice problems from textbooks