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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 rotation through which a handle is rotated (n)=?
Thickness of the metal plate, `(t)=3.5cm`
`:.` Distance moved by the jaw = thickness of plate which is held
`:. 3.5 cm=nxx` Distance move by jaw per one rotation
`3.5cm=nxx7mm`
`3.5xx10mm=xx7`
`n=(35)/(7)=5`
`:.` Number of rotations made by handle , (n)=5
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