raf5yvah58 raf5yvah58 06-07-2021 Mathematics contestada The force "F" applied on a spring and its extension "x" is given by the relation F = - k*x where "k" is the constant of proportionality. Find "k" if a force of 10 Newtons produces an extension of 5 cm. A. - 50 N/cm B. 0.5 N/cm C. - 20 N/cm D. - 2 N/cm HELP