The back end (half the weight)of a car of mass 2500 kg is lifted by a hydraulic jack.the area of the lifting piston is 10 time the area of pumping piston .the stroke of the pumping piston is 2cm .the back end of the car is to be raised to a height of 5 cm. Calculate.(1)The force exerted by the pumping piston.(2)the number of time the pump handle need to be operated

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