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A force of 5kgf is required to cut a metal sheet. A shears used for cutting the metal sheet has its blades 5 cm long, while its handle is 10 cm long. What effort is needed to cut the sheet?
A force of 5kgf is required to cut a metal sheet. A shears used for cutting the metal sheet has its blades 5 cm long, while its handle is 10 cm long. What effort is needed to cut the sheet?
Class 10 | ICSE | Machines | Physics | Selina
A force of 5kgf is required to cut a metal sheet. A shears used for cutting the metal sheet has its blades 5 cm long, while its handle is 10 cm long. What effort is needed to cut the sheet?

Solutions:

According to the question,

Effort arm is 10 cm long

Load arm is 5 cm long

Expression for Mechanical advantage is

M.A. = Effort arm / Load arm = 10 / 5

M.A. = 2

For effort, the expression becomes –

Effort = Load / M.A = 5 / 2

Therefore, Effort= 2.5 kgf

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