resultant forces

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

  Resultant force
• What is a resultant force?

  A single force that has the same effect as all original forces acting together
• How do you calculate the resultant force when two forces are acting in opposite directions?

  Subtract the smaller force from the larger force
• What is the value of the man's force pushing the box?

  20 Newtons
• What is the friction force acting on the box?

  10 Newtons acting to the left
• What is the resultant force when a man pushes a box with 20 Newtons to the right and there is a friction force of 10 Newtons to the left?

  10 Newtons acting to the right
• What is the driving force of the car mentioned in the video?

  10,000 Newtons acting to the left
• What forces act against the car as it travels?

  Friction force and air resistance
• How do you calculate the total force acting to the right on the car?

  Add the friction force and air resistance together
• What is the total force acting to the right on the car?

  9,000 Newtons
• What is the weight of the skydiver?

  800 Newtons acting downwards
• What upward force does the skydiver experience due to air resistance?

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

  The resultant force is zero
• What is the resultant force on the car after calculating the total forces?

  1,000 Newtons acting to the left
• How is a Freebody diagram represented?

  The object is shown as a point with forces as arrows starting at the point
• What does the length of the arrow in a Freebody diagram represent?

  The size of the force
• What does the direction of the arrow in a Freebody diagram indicate?

  The direction of the force
• What is the term used for the height above the ground?

  Altitude
• What force acts downwards on the airplane?

  The weight of the airplane
• What force acts in the opposite direction to the weight of the airplane?

  Lift
• What is the forward force provided by the engines of the airplane called?

  Thrust
• What force acts in the reverse direction on the airplane?

  Air resistance or drag
• What does it mean when the airplane is moving at a constant velocity?

  The forward and backward forces must be balanced
• What are the steps to draw a Freebody diagram?

  • Represent the object as a point
  • Draw arrows for each force acting on the object
  • Ensure the length of the arrows represents the size of the forces
  • Ensure the direction of the arrows indicates the direction of the forces
• What are the key concepts related to resultant forces discussed in the video?

  • Definition of resultant force
  • Calculation of resultant forces in straight lines
  • Drawing Freebody diagrams
  • Understanding balanced and unbalanced forces