1) How is the magnitude of the applied force and the spring force, also known as the restoring force related? 2) Do the applied force and spring force act along the same direction?
3) Does a higher value of k result in a stiffer/less stretchy spring, or a less stiff/more stretchy spring?
4) How is the displacement and applied force related?
5) How does the proportionality region change in the Hooke’s law graph change with respect to increase in spring constant, k?

the answer is 3.1 his answer is wrong mines is right

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.