Hello!
We have the following data:
F (force) =? m (mass) = 40 kg
a (acceleration) = 0.93 m / s²
k (spring constant) =?
x (spring deformation) = 0.82 m
Let us first find the applied force, through the following formula:


Now let's find the spring constant, using Hooke's formula





Answer:
We have a spring constant with about 45 N / m