resultant forces

• What is meant by a resultant force?

  A single force representing multiple forces
• How do you calculate the resultant of forces acting in a straight line?

  Subtract the smaller force from the larger force
• What is a Freebody diagram used for?

  To show forces acting on an object
• 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 to the right and friction is 10 Newtons to the left, what is the resultant force?


  10 Newtons to the right
• What is the resultant force on the car if the driving force is 10,000 Newtons and total opposing forces are 9,000 Newtons?

  1,000 Newtons to the left
• What does it mean when forces are balanced?

  The resultant force is zero
• What does the length of the arrow in a Freebody diagram represent?

  The size of the force
• What does the term altitude refer to?

  The height above the ground
• What is the force of air resistance also known as?

  Drag
• Why must the forward and backward forces on the airplane be balanced?

  Because it moves at constant velocity
• What are the steps to draw a Freebody diagram?

  • Represent the object as a point
  • Draw forces as arrows starting from the point
  • Length of arrows shows force size
  • Direction of arrows shows force direction
• What are the forces acting on an airplane flying at constant altitude?

  • Weight acting downwards
  • Lift acting upwards
  • Thrust acting forwards
  • Drag acting backwards