The pressure applied on the ground is 21.33 Pa and on psi the pressure is [tex]0.003\rm \ lb/in^2[/tex].
Pressure:
It can be defined by the force applied per unit area. It is measured in the pascal. Pascal is equal to the N/m².
[tex]P = \dfrac{F}{A}[/tex]
Where,
[tex]P[/tex] = pressure
[tex]F\\[/tex] = force = mg = 68 kg × 9.8 m/s² = 666.4 N
[tex]A[/tex] = area = (2 × (0.04 m)²= 0.0032 m²
Put the values in the formula,
[tex]P = \dfrac {666.4\rm \ N}{0.0032 \rm \ m^2}[/tex]
[tex]P =21.33 \rm \ Pa[/tex]
Part -2:
psi measure the pressure in pound -force per square inch.
1 psi = 6894.76 Pa
So,
[tex]\rm {psi = \dfrac { 21.33\rm \ Pa}{6894.76 \rm \ Pa} }\\\\\rm psi = 0.003\rm \ lb/in^2[/tex]
Therefore, the pressure applied on the ground is 21.33 Pa and on psi the pressure is [tex]0.003\rm \ lb/in^2[/tex].
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