Home › ICSE Class 8 › physics › Force and Pressure › Atmospheric pressure on the human body is roughl…
Atmospheric pressure on the human body is roughly 100,000 Pa. Why don't we feel crushed?
AAir is invisible in standard practice
BSkin is impermeable to air in the standard view
CAtmospheric pressure is wrong
DThe internal body pressure balances atmospheric pressure
Answer & Solution
Correct answer: A. Air is invisible in standard practice
1. The atmosphere does press on us with about 10^5 Pa.
2. Our blood and other body fluids push outward with equal pressure.
3. The inward and outward pressures balance.
4. So we feel no net force.
5. Hence atmospheric pressure does not crush the body.
_Source: Selina Concise Physics ICSE Class 8, Ch 3 'Force and Pressure'_
Related questions
The instrument used to measure atmospheric pressure is the:Friction acts:Action and reaction forces:Why are dams built thicker at the bottom than at the top?A camel can walk easily on desert sand because:Pressure at the bottom of a tall water column compared with a short column:Why is it easier to break a watermelon by pressing a needle than by pressing the palm?Which is an example of a non-contact force?