The discus throw is a sporting event in which athletes throw a heavy disc, called a discus. The athlete with the longest distance throw wins. The table shows the results pf a competition between three athletes. Based on the evidence in the table, which statement is correct about the discus?
A. The discus does not accelerate because it is not moving at the end of the throw.

B. Raven used a discus with the greatest mass, so it moved the least distance.

C. Dani applied the most force to the discus, so it moved the greatest distance.

D. Sandra's discus has less mass than Dani's discus, so Sandra couldn't throw her discus as far.

spectral lines lyman is one set

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.