A boy of mass 50 kg exerts a pressure of 25000 pa calculate the area
which the force acts A = 0.02m²

A = 0.02 m²

Explanation: Solution:

Pressure is expressed in the formula:

P = F / A       where F = mg

  = mg /A

  = 50 kg ( 9.8 m/s²) / 25000 Pa

  =  0.02 m²

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.