00:01
Hello, here a body has a mass of 3 kilograms and it's connected to the block with a mass of 5 kilograms.
00:08
R small is 0 .25 meters and radius of the disc is 0 .5 meters.
00:14
Let's make the sketch.
00:22
Now let's show the objects.
00:36
Now let's show acceleration and angular acceleration.
00:39
First, we have to determine moment of inertia.
00:56
That's 0 .625 kilogram meter squared.
01:00
In question two, we have to find tension and angular acceleration and also the linear acceleration.
01:15
Let's do this.
01:15
Let's start with a second newton's law for an object.
01:23
And now let's write down the rotational equation for the block.
01:27
Now let's simplify this expression.
02:47
Now let's calculate it.
03:03
That's 9 radians per square second.
03:06
Now we can find a.
03:09
That is alpha r.
03:11
And now we can find tension.
03:24
Tension is angular acceleration.
03:32
I'm sorry, moment of inertia angular acceleration divided by the radius.
03:47
That's 23 newtons...