The mechanical advantage of a lever is equal to:

Load arm + Effort arm

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Load arm - Effort arm

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\frac{E f f o r t a r m}{L o a d a r m}

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\frac{L o a d a r m}{E f f r o r t a r m}

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Solution

The correct option is C $\frac{E f f o r t a r m}{L o a d a r m}$
Mechnical Advantage of a lever is expressed as

Mechanical Advantage = $\frac{L o a d}{E f f o r t}$

According to Principle of Lever,
Load $\times$ Load arm = Effort $\times$ Effort arm

On rearranging, we get

Mechanical Advantage = $\frac{E f f o r t a r m}{L o a d a r m}$

Hence, option (B) is correct.

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Types of Lever

Standard X Physics

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The mechanical advantage of a lever is equal to:

The correct option is C EffortarmLoadarmMechnical Advantage of a lever is expressed as Mechanical Advantage = LoadEffort According to Principle of Lever, Load × Load arm = Effort × Effort arm On rearranging, we get Mechanical Advantage = EffortarmLoadarm Hence, option (B) is correct.