resultant forces

• What is meant by a resultant force?

  A single force that has the same effect as all of the original forces acting together
• How do you calculate the resultant of forces acting in a straight line?

  Subtract the smaller force from the larger force
• 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
• What does a resultant force of 10 Newtons to the right indicate?

  The box is accelerating to the right
• What does it mean when the resultant force is zero for the skydiver?

  The forces acting on the skydiver are balanced
• What is a Freebody diagram?

  A diagram showing forces acting on an object
• How are forces represented in a Freebody diagram?

  As arrows starting at a point
• What does the length of the arrow in a Freebody diagram represent?

  The size of the force acting on the object
• What does it mean for the aeroplane to be at a constant altitude?

  The forces acting on it are balanced
• What forces act on the aeroplane while flying at constant velocity?

  Lift, weight, thrust, and drag
• How do the forward and backward forces on the aeroplane relate when it moves at constant velocity?

  They must be balanced in magnitude
• What are the steps to calculate resultant forces?

  1. Identify all forces acting on the object.
  2. Determine the direction of each force.
  3. Subtract the smaller force from the larger force.
  4. The result is the resultant force.
• What is the significance of a Freebody diagram in physics?

  • Visual representation of forces
  • Helps in analyzing forces acting on an object
  • Simplifies complex force interactions
• how do you calculate work done

  work done = force x distance
• what happens when a force moves an onject through a distance

  energy is transferred and work is done
• what are the forces if the object is in equilibrium

  forces are balanced
• what does it mean if the resultant force is zero

  the onject is stationary or is moving at a constant speed