Calculating pressure in a barometer

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To calculate the pressure inside the cylinder, first determine the total force acting on the piston, which includes the weight of the piston (4 kg multiplied by gravitational acceleration), the force from the spring (60 N), and the atmospheric pressure acting on the piston area. The atmospheric pressure is converted to Newtons by multiplying it by the piston area in square meters. The total force is then divided by the piston area to find the pressure in pascals. This method assumes uniform pressure distribution across the piston.
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A gas is contained in a vertical frictionless piston-cylinder device. The piston has a mass of 4 kg and cross sectional area of 35 cm2. A compressed spring above the piston exerts a force of 60N on the piston. If the atmospheric pressure is 95 kPa, determine the pressure inside the cylinder.


how do you solve this question
 
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assuming pressure to be uniformily applied, you can just divide total force (4*9.81 + 60 + 95*1000* 35*0.0001) by piston area (35*0.0001). you will answer in pascal.
 

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