forces ep 1

• Force


  The push and pull applied to an object, an influence that changes the motion of an object
• Applying force to an object

  1. Object remains stationary

  2. Apply force to move object

  3. Apply force in opposite direction to stop object
• Force


  • Magnitude (how strong the force is)
  • Direction (where the object goes)
  • Point of application (location where force is applied)
  • Line of action (straight line passing through point of application, parallel to direction of force)
• Magnitude of force


  Expressed in newtons, dynes, or pounds
• The greater the magnitude of force, the faster the velocity of the object
• Types of force


  • Contact forces
  • Non-contact forces
• Contact forces


  Applied force<|>Friction force<|>Normal force<|>Tension force
• Applied force


  Force exerted by a person or object towards another
• Friction force


  Force that causes an object's movement to slow down
• Normal force


  Force acting perpendicular to an object's surface
• Tension force


  Force applied to string, rope, chain, cable to resist stretching
• Normal force supports an object as surface resists compression, tension force resists force that causes objects to stretch
• Pushing a wall shows applied force, not tension force