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प्रश्न
Solve the following numerical problem.
Calculate the mechanical advantage of a crowbar of length 240 cm if its fulcrum is situated at a distance of 40 cm from the load.
उत्तर
Length of crowbar = 240 cm
Length of load arm = 40 cm
Length of effort arm = 240 cm – 40 cm
= 200 cm
Mechanical advantage = `"Load"/"Effor"="Effort arm"/"load arm"`
= `(200"cm")/(40"cm")` = 5
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