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In a car-lift a car of 1200kg mass is resting on a platform of surface area 10 m2. what pressure should the platform exert on the car so as to lift it



Force exerted by the car=mg     [g=acceleration due to gravity]
                                       =11760 Newton
               = 11760/10
               =1176 N/m²
Noe, since the car is already exerting 1176 N/m² of pressure, so the platform should exert pressure greater than 1176 N/m² to lift the car.
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