Labels:text | screenshot | cartoon OCR: CAR JACK W. WITH THE AID of a car jack, one person can produce enough force to lift a car. This jack uses a screw principle to amplify the turning force applied to the handle, which is itself a rotating lever. The handle may move fifty times further than the car, HANDLE so the force on the car is fifty times greater than the effort on the handle. SCREW JACKING POINT. CAR WHEEL SEE ALSO
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