00:01
In this question we have as given here the initial velocity of car, we will take that as v0 is equal to 80 fits per second.
00:21
So for solution of our part first, which is a part, we can say car stop in five seconds.
00:34
So we will take here our final velocity as v is equal to 0.
00:45
So as for the motion equation, v is equal to v0 plus 80.
00:53
So we'll place here as 0 at the place of final velocity.
00:56
Initial velocity is 80.
00:58
Excellation we need to find that and time duration is 5 seconds.
01:03
So our value would be as a multiplied by 5 is equal to minus.
01:10
80.
01:10
So value of a will minus 16.
01:14
And as it is negatively, so this is a retardation.
01:23
So our acceleration is fits per second is square.
01:28
And then we can say then the velocity, velocity of the car at time t is given while we will solve this at time t.
01:48
T.
01:49
Will be v is equal to 80 minus 16.
01:55
So this will be the equation and with the help of this equation we will plot our graph.
02:02
Graph is like this.
02:03
Here we have our x -exes value.
02:06
This is our y -axis.
02:09
So 0, 1, 2, 3, 4, 5, 6 and 7.
02:15
1, 2, 3, 4, 5, 6 and 7.
02:18
On the yxas we have our values as 10, 20, 30, 40, 50, 60, 70 and 80.
02:34
So our line will be crossing through 80 and 5.
02:40
So the line will be like this...