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Question
A force of 5 kgf is required to cut a metal sheet. A pair of shears used for cutting the metal sheet has its blades 5 cm long, while its handles is 10 cm long. What effort is needed to cut the sheet?
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Solution
Effort arm = 10 cm
Load arm = 5 cm
Mechanical advantage = M.A = `"Effort arm"/"Load arm"`
M.A. = `10/5`
M.A. = 2
Load = 5 kgf
Effort = `"Load"/"M.A." = 5/2` = 2.5 kgf
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