Marco was looking at this picture of two boats sitting differently in the water. He decided to compare the way the two boats sit in the water to the way land is behaving in Greenland. Illustration of two boats with the boat on the left sitting higher in the water and showing a shallower water level than the boat on the right which is sitting lower in the water and shows a deeper water level.

Explain how what is happening in Greenland is similar to the ways the two boats are sitting in the water.

see earlier answer

answer and explanation;

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.