forces paper 2💜

• Resultant force is a single force that has the same effect as all the original forces acting on an object
• Determining the resultant force

  1. Set a direction as positive

  2. Add all the forces acting in that direction

  3. Subtract all the forces acting in the opposite direction
• A free body diagram shows all the forces acting on an object
• Scale drawings can be used to find the resultant force acting on an object
• If all the forces acting on an object combine to give a resultant force of zero, the forces are balanced and the object is in equilibrium
• Resolving forces means splitting a force into horizontal and vertical components
• Work done


  The energy transferred when a force moves an object through a distance
• One joule of work is done when a force of one newton causes an object to move a distance of one metre
• Work done against friction can cause a rise in the temperature of an object and the surroundings
• Energy is transferred from one store to another when work is done