You have arrived at the scene of a two car accident. you know the following pieces of information:

car 1 and car 2 have equal masses of 2,000 kg each

car 1’s initial momentum was 40,000 kg-m/s to the right; car 2 wasn’t moving

car 1 collided with car 2

car 1’s final velocity is 10 m/s to the right; car 2’s final velocity is unknown.

what is each cars initial velocity

protons in

v 154.9= 0.9 length length s little over 154.9cm

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.