In a Class 3 lever, the effort and load move:

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RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 2)
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  1. In the opposite direction
  2. In the same direction
  3. In the perpendicular direction
  4. Depending on the load

Answer (Detailed Solution Below)

Option 2 : In the same direction
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Explanation:

  • A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum, used to transfer a force to a load and usually to provide a mechanical advantage.
  • On the basis of the locations of fulcrum, load, and effort, the lever is divided into three types.
  • First Class Lever:In a first-class lever, the fulcrum is located between the effort and the load. When force is applied to one end of the lever (effort arm), it causes the other end to move, exerting force on the load. Examples include seesaws, crowbars, and scissors.

IMG 500

  • Second-class lever: In a second-class lever, the load is located between the fulcrum and the effort. This means that the effort arm is always longer than the load arm. When force is applied to the effort arm, it causes the load to move. Examples include wheelbarrows, bottle openers, and nutcrackers.

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  • Third-class lever: In a third-class lever, the effort is applied between the fulcrum and the load. This means that the load arm is always longer than the effort arm. While third-class levers don't provide a mechanical advantage like first and second-class levers, they allow for greater speed and range of motion. Examples include fishing rods, shovels, and tweezers.

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