Question: A body builder exerts a force of $150 \mathrm{~N}$ against a bullworker and compresses it by $20 \mathrm{~cm}$. Calculate the spring constant of the spring in the bullworker.
Solution:
Net Force
$F=k x$
$150=k \times 0.2$
$\mathrm{k}=750 \mathrm{~N} / \mathrm{m}$
