00:01
So for part i, part i, part a, we know that the average acceleration is equaling the change in velocity with respect to time here.
00:13
From zero, we can say that the velocity at t equals five seconds minus the velocity at t equals zero seconds divided by five seconds minus zero seconds.
00:26
This is equaling negative 8 .0 minus negative 8 .0 and again meters per second divided by of course five seconds.
00:42
However, this is equaling zero.
00:44
So the average acceleration is equaling zero meters per second squared.
00:49
Now for part b, we can say that then the average acceleration is equalling a velocity at t equals.
00:59
15 .0 seconds minus the velocity at t equals 5 .0 seconds and divided by 15 seconds minus 5 seconds.
01:11
This is equaling this would be 8 .0 and then minus negative 8 .0 again meters per second divided by 15 minus 5 so 10 seconds and so this is equaling 1 .6 1 .6 meters meters per second squared.
01:33
So this would be your answer for part ib and then ia and then for part c, part i.
01:43
C, we have the average acceleration equaling the velocity at t equals 20 seconds minus the velocity at t equals 0 seconds divided by 20 seconds.
01:58
So this is equaling, again, 8 .0 meters per second minus negative 8 .0 meters per second.
02:16
This is divided by 20 seconds...