00:03
Hello, in this question we apply kinematics to the flow of blood.
00:10
We are told that the blood is pumped or accelerated from rest, so initial velocity is zero.
00:16
And it is accelerated to a final velocity of 30 centimeters per second.
00:24
And we change 30 centimeters to meters, we divide by 100, so that would be 0 .3 meters per second.
00:33
The distance covered within this acceleration is given us 1 .8 centimeters.
00:40
Again, we divide by a hundred, that is 0 .018 meters.
00:48
A sketch of the problem will look like this.
00:53
Velocity versus time starts from rest.
00:58
Acceleration increases, or acceleration is positive, and so at a particular time the velocity is 0 .3 test per second.
01:17
We could also sketch the displacement time graph, right? start from rest and after some time the displacement which is 0 .00, 0 .018 meters.
01:54
So the displacement time graph is a curve, an upward curve, and the velocity time graph is a straight line.
02:04
So that is a.
02:07
What are the unknowns in this question? we don't know the time it took to accelerate from this velocity to that velocity.
02:17
We also don't know the value of the acceleration...