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 acting 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 acting to the right
• How do you find the resultant force when multiple forces act on an object?

  Sum forces in one direction and subtract others
• What is the resultant force on the car after calculating the forces?

  1,000 Newtons acting to the left
• What force does a skydiver experience while falling?

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

  The resultant force is zero
• What does a Freebody diagram represent?

  The forces acting on an object as arrows
• What does the length of the arrow in a Freebody diagram indicate?

  The size of the force being represented
• What is the weight of the aeroplane acting downwards?

  Equal to the lift force acting upwards
• What is the forward force provided by the engines called?

  Thrust
• What is the force of air resistance also known as?

  Drag
• How do the forces acting on the airplane relate to its motion?

  They must be balanced for constant velocity
• What are the steps to calculate resultant forces?

  1. Identify all forces acting on the object.
  2. Determine the direction of each force.
  3. Sum the forces in one direction.
  4. Subtract opposing forces to find the resultant.
• What are the key components of a Freebody diagram?

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