A 75 kg astronaut is in space fixing a satellite when you need to consult the repair manual. So, a second
astronaut throws the manual in a straight line towards the first astronaut, at 3.0 m / s
in relation to spacecraft. Astronaut 1 is at rest in relation to spacecraft
before grabbing the 2 kg manual. Determine (in relation to spacecraft) (a) the
speed of astronaut 1 right after grabbing the book, (b) the initial kinetic energies and
end of the book-astronaut system and (c) the momentum exerted by the manual on the
astronaut. (d) Finally, determine the speed of the astronaut, before and after
grab the manual, in the reference center of mass of the manual-astronaut system.

does anyone know or what?

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

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.