A hand$-$driven tire pump has a piston with a $2\mathrm{.}2$ cm diameter and a maximum stroke of $24$ cm$.$ Part $($a$)$

How much work do you do in one stroke if the average gauge pressure is $2\mathrm{.}3105$ N$/$m$2?$

W $=20\mathrm{.}9820\mathrm{.}98$Correct$!$

$$ Part $($b$)$

What average force do you exert on the piston, neglecting friction and gravitational force?