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प्रश्न
A pair of scissors has its blades 15 cm long, while its handles are 7.5 cm long. What is its mechanical advantage?
संख्यात्मक
उत्तर
Length of blades = 15 cm = Load arm
Length of handles = 7.5 cm = Effort arm
Mechanical advantage M.A of scissors = `"Effort arm"/"Load arm"`
= `7.5/15`
= `1/2`
= 0.5
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Relationship between efficiency (ղ), mechanical advantage (M.A.) and velocity ratio (VR)
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