00:01
Hello.
00:03
So from the given information, if you want to find the magnitude of the cast constant acceleration before impact, we can use s equals ut plus half a t squared so that our distance is 25, right? our initial velocity is 56 kilometers.
00:51
We need to convert that to seconds, meters per second.
00:57
So this is going to be 56 kilo, right? it's a thousand.
01:02
So a thousand an hour converted to seconds.
01:11
So this is going to be 15 .5, 6 meters per second.
01:17
So we have 15 .56 time is 2 .56.
01:29
35 plus half a times 2 .3 .3.
01:45
So now, can do 25 minus 15 equals half to 35 to 8.
02:09
Okay, so let's figure out what we have on the left.
02:12
So we have 25 minus 15 times 2 .35 plus negative 11 .566.
02:44
10 on the right we have 0 .5 times 2 .35 squared, 2 .768.
02:58
Okay.
03:00
So our a is going to be 11 .566 divided by 2 .76, divided by 2 .76, it will be negative 4 .1 .9.
03:20
Need this for a second.
03:22
Okay.
03:23
And it's negative because the the car is decelerating, right? it's going to rest.
03:33
So there is deceleration.
03:36
So that's the first part of the question...