resultant forces

• • a resultant force is the single force which replaces a number of forces acting on an object
• • free body diagrams are used to describes all the forces acting on an isolated object
• • an example of the forces acting of an isolated object is a skydiver
  • a skydiver's weight acts on him, which pulls the skydiver towards the ground
  • drag/air resistance acts in the opposite direction to the motion of the skydiver