what is the purpose of a jack in lifting a car by it
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a jack screwjack or jackscrew is a mechanical device used as a liftingdevice to lift heavy loads or to apply great forces A hydraulic jack uses hydraulic power The most common form is a car jack floor jack or garagejack which lifts vehicles so that maintenance can be performed
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The purpose of jack is to make the effort less than the load so that it works as a force multiplier.
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