Answer:
The proportionality constant of the spring is 0.42857 N/cm.
Step-by-step explanation:
The proportionality constant (k) of a spring is given by the equation: force (F) = k * displacement (x)
k = F / x
Therefore, to find the proportionality constant of the spring, we can divide the force applied (75 N) by the displacement (175 cm)
k = 75 N / 175 cm
k = 0.42857 N/cm
The proportionality constant of the spring is 0.42857 N/cm.