A porter carries a 5 kg mass on his head and the area of the contact between the mass and his head is 0.01m. what is the pressure exerted on his head?

Expert Answers
Borys Shumyatskiy eNotes educator| Certified Educator

Hello!

The pressure, by definition, is the force divided by the area at which it acts (perpendicularly),

`P=F/A.`

Here `F=mg` where `F` is given and `g` is the acceleration of (Earth's, I believe) gravity.

`A` is given also, but in meters, which is incorrect. This number must be in square units, I suppose `A=0.01m^2.`

The unit for the pressure is pascal Pa (newton per square meter).

So   `P=F/A=(mg)/A = (5*9.8)/0.01 = 49/0.01 = 49*100 = 4900 (Pa).`

 

The answer is 4900 Pa.