Question

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

Answer 1

Here,
Force exerted by the car=mg     [g=acceleration due to gravity]
                                       =1200*9.8
                                       =11760 Newton
Since, 
Pressure=Force/Area
               = 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.

Answer 2

Answer:

Here is your answer:-

Explanation:

Here,

Force exerted by the car=mg     [g=acceleration due to gravity]

                                       =1200*9.8

                                       =11760 Newton

Since, 

Pressure=Force/Area

               = 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.