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The movable jaw of a vice moves through ...

The movable jaw of a vice moves through a distance of 7mm for one complete rotation of the handle. Through how many rotation shold the handle be rotated so that it holds a metal plate of thickness 3.5 cm firmly.

Text Solution

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Number of rotations through which a handle is rotated (n)=?
Thickness of the metal plate (t) =3.5 cm
`:.` Distance moved by the jaw=thickness of plate which is held
`:.3.5cm=nxx` Distance moved by jaw per one rotation.
`3.5cm=nxx7mm`
`3.5xx10mm=nxx7mm`
`n=35/7=5`
`:.` Number of rotations made by handle (n) =5
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