A man uses a crowbar of length $1.5 m$ to raise a load of $75 k g f$ by putting a sharp edge below the bar at a distance $1 m$ from his hand. Calculate the load arm.

0.1 m

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1 m

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5 m

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0.5 m

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Solution

The correct option is A $0.5 m$
Load $= 75 k g f$
Length of crowbar $= 1.5 m$
Effort arm is the distance between the effort applied (hand) and the fulcrum which is $1 m$ from the hand. Hence, effort arm is $1.0 m$
Effort arm $= 1 m$
Load arm is the distance between the fulcrum and the load.
So, $load Arm = Length of crowbar - Effort arm$
$\Rightarrow 1.5 - 1 = 0.5 m$

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A man uses a crowbar of length 1.5m to raise a load of 75kgf by putting a sharp edge below the bar at a distance 1m from his hand. Calculate the load arm.

A man uses a crowbar of length $1.5 m$ to raise a load of $75 k g f$ by putting a sharp edge below the bar at a distance $1 m$ from his hand. Calculate the load arm.