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Physics

The mechanical advantage of a lever is equal to :

  1. Load ArmEffort Arm\dfrac{\text {Load Arm}}{\text {Effort Arm}}\\[0.5 em]
  2. Effort ArmLoad Arm\dfrac{\text {Effort Arm}}{\text {Load Arm}}
  3. Load Arm + Effort Arm
  4. Load Arm - Effort Arm

Machines

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Answer

Effort ArmLoad Arm\dfrac{\text {Effort Arm}}{\text {Load Arm}}

Reason — According to the principle of a lever the mechanical advantage of a lever is equal to the ratio of the effort arm to the load arm and is given by :

Mechanical Advantage=LoadEffort=Effort ArmLoad Arm\text {Mechanical Advantage}=\dfrac{\text {Load}}{\text {Effort}}=\dfrac{\text {Effort Arm}}{\text {Load Arm}}

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