A block with mass $m=7\mathrm{.}5kg$ is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches $x=0\mathrm{.}28m.$

The mass is given a push downward from its equilibrium position with an initial speed $v_0=3\mathrm{.}9\frac{m}{s}.$ The block then oscillates on the spring without friction.At time $t=0\mathrm{.}33s,$ what is the magnitude $F_{\text{n}\text{e}\text{t}}(t)$ of the net force on the block?

$F_{\text{n}\text{e}\text{t}}(0\mathrm{.}33s)=$

$67\mathrm{.}7$ I $$

Enter numeric value