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The 3 types of levers. Give examples and explain them.​

Sagot :

Shermanamantilliidn

Answer:

There are three classes levers, according to the position of the fulcrum. Class 1 has the fulcrum placed between the effort and load. Class 2 has the load between the effort and the fulcrum. Class 3 has the effort between the load and the fulcrum.

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THE 3 TYPES OF LEVERS

Lever is composed of straight or bend rigid bar that is free to turn on the fixed movable part known as fulcrum.

PARTS OF A LEVER

  • 1.) Resistance (R) or load. A force that is being lift by the effort.

  • 2.) Effort (E). A force that lifts the resistance.

  • 3.) Fulcrum (F). The point on which a lever rests or is supported and on which pivot points. Movement of the machine.

  • 4.) Resistant arm. The distance of the resistance to the fulcrum.

  • 5.) Effort arm. The distance of effort to the effort.

CLASSES OF LEVER

The three classes of levers vary in the placement of the effort, resistance or load, and the fulcrum along the bar.

1.) FIRST-CLASS LEVER (RFE of EFR)

  • The fulcrum is between the effort and the load or resistance as in a seesaw.

  • Seesaw
  • scissors
  • Pliers

2.) SECOND-CLASS LEVER (FRE or ERF)

  • The fulcrum lies at one end, the effort is applied to the other end, and the load is in the middle as in a wheelbarrow.

  • Stapler
  • wheelbarrow
  • nutcracker

3.) THIRD-CLASS LEVER (REF or FER)

  • The fulcrum is at one end but the load is at the other end and the effort is applied in the middle as in a human forearm.

  • Spoon
  • Tong
  • Forearm

ADDITIONAL INFORMATION:

What is lever:

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