Wednesday, June 11, 2014

The types of the levers and the importance of each of them



The levers

 

People use the levers but they do not know the type of them and how to determine the type of any lever .

 

Do you know that the levers are classified according to the location of the effort force , the resistance force and the fulcrum ?

 

There are three types of levers . 



 

The types of the levers 

 

  1. The First class levers : In our daily life , The first class levers are considered the most popular type of levers .

     

    In first class levers , the fulcrum is between the effort force and the resistance .

     
    The first class lever
    The first class levers have the fulcrum between the resistance force and the effort force .

    Examples of first class levers :The pincer , the pliers , the paddle , the scissors , the seesaw , the crowbar , the hammer claw , the suction , the pump , the nail clipper and the balance  .

    The First class levers
    The hammer claw and the scissors are from the first class levers .

    You should know that each of the scissors , the pincer , the pliers and the nail clipper are composed of two first class levers  .

     

  2. The Second class levers : In the second class levers , the resistance force is between the effort force and the fulcrum . 


    The second class levers
    The second class levers have the resistance force between the fulcrum and the effort force .

    Examples of the second class levers : The bottle opener , the stapler , the wheel barrow and the nutcracker .

    The second class levers
    The bottle opener and the nut cracker are from the second class levers .

     

  3. The Third class levers : In the third class levers , the effort force is between the resistance force and the fulcrum . 

    The third class levers
    The third class levers have the effort force between the resistance force and the fulcrum .

    Examples of the third class levers : The Hockey bat , The manual broom , the tweezers , the fishing tool ( the fishing hook ) , the ice or the sweet holder and the cool tongs ( the cool holder ) .

     
    The third class levers
    Manual broom , Tweezers , cool tongs and fishing hock are from the third class levers .

    You should know that the nutcracker is composed of two levers of the second class levers and the tweezers is composed of two levers of the third class levers

     

Do you know that you can determine the type of any lever in our daily life ?

 

  1. First , Imagine and think of the way of the lever work .

     

  2. Then , You should determine the position of the effort force , the resistance force and the fulcrum .

     

  3. You should identify the mid point of the lever .

     

  4. Finally , If the mid point of the lever is the fulcrum , So , It is from the first class levers .

     

    If the mid point of the lever is the resistance force , So , It is from the second class levers .

     

    If the mid point of the lever is the effort force , So , It is from the third class levers .

 

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