Mechanical devices

• What can mechanical devices change

  one form of force to another
• What does an input force transform into

  A force to make an output motion
• Linear motion


  Movement in a straight line.
• Reciprocating motion


  a back and forth or up and down movement
• Rotary Motion


  circular movement
• Oscillating motion


  Backwards and forwards movement along a curved path
• What does mechanical advantage make easier

  Lifting and moving
• What does mechanical advantage consist of

  A rigid bar that pivots or rotates about a fulcrum with a load applied
• What does a typical lever consist of

  Fulcrum, effort and load
• Fulcrum


  a pivot point around which a lever turns
• Effort


  An input force
• Load


  An output force
• What formula do we use to calculate mechanical advantage

  MA=Load divided by effort
• What do first class levers have


  The fulcrum between the load and force
• What is an example of first class levers

  Pliers
• How are second order levers remembered

  They are remembered as having a wheelbarrow action
• Where is the fulcrum and the effort located

  The fulcrum is at one end and the effort is at the opposite end
• Where is the load located

  Anywhere in the middle
• Where is the fulcrum, load and effort located on a class 3 lever


  It is located at one end, the load at the opposite end and the effort in the middle.
• What is an example of a class 3 lever

  Tweezers