Question

Using the formula Pressure = force / area in Nm-2 , solve the numerical problem. A liquid is contained in a cylinder with a movable piston. The pressure exerted by the liquid is 3000 Pa. The area of the piston is 0.90 m2. Find the force acting on the piston. pls answer correct and fast, fast , fast

Answer 1

Answer:

Pressure is defined as the force exerted (on a surface) per unit surface area.   Pressure is a scalar.  

P = F / A,      Its unit is Pascal = Newton / meter².   There are also some other units in use for pressure.

1)   F = P * A = 50, 000 Pascals * 0.5 meter =  25, 000 Pascals or N/m²

2)  Surface Area A = Force / Pressure = 100 N / 500 pa  = 1/5 m²  

3)  Area = 30 cm² = 30 / (100*100)  meter²

    Pressure = F / A = 300 N / (3/1000) = 100 * 1000 pa  = 1 * 10⁵ pa

4 )  Area =  1 cm² = (1/100)² meter²

       Force needed = P A  = 20, 000 pa * (1/100²) m²  =  2 Newtons

Answer 2

Answer:

Calculate the specific weight, density and specific gravity of 1 litre of liquid which ... The total force vector acting at the center of pressure is the value of ... Torque T = F * D/2 = 205.77 * 0.5/2 =51.44 Nm.