Question

When air beneath the piston is completely pumped out, how much does the atmospheric pressure cause the spring to compress?

Answer 1

$P_{0}A=kx$
$\therefore$ $x=\frac{p_{0}A}{k}=\frac{\left(p_0\right)\left(\pi r^2\right)}{k}$
$=\frac{(1.01\times {10}^5)\left(\pi \right){\left(0.025\right)}^2}{3600}$
$=0.055$ m$=5.5$ cm