Jillian is running errands. During part of her day, she travels 10 km east for 10 min. She stop at a store for 15 min, and travels 15 km west for 22 min. (A) How many legs does the trip have? Answer the question

(B) Write down the data for each leg for the trip? Answer the question

(C) What was Jillian’s average speed for her entire trip ? Answer the question

(D) What was her average velocity for the entire trip? Answer the question

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.

there are no atoms