A region in space has a uniform electric field equal to 400 N/C that points to the left. A 2.0x10-6 C test charge with a mass of 0.10 grams is placed in the field at rest and released. Describe the motion of the charge in the field after it is released. What is the magnitude and direction of the electric force on the charge

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.

answerdmitry mendeleyev made a workable classification of the elements

the doppler effect is used by weather forecasters to measure 

moving clouds