00:01
Hello students, according to this question we are going to find the acceleration.
00:06
Before that we are going to consider the r value.
00:08
R is equals to k theta.
00:12
After differentiation we will get r dash is equals to k theta dash.
00:19
Again we are going to differentiate so that we get r double dash is equals to k alpha.
00:27
Now double dash is equals to alpha.
00:31
We are going to consider double dash as an angular acceleration.
00:37
Now theta dash is equals to alpha t plus c1.
00:45
We are going to consider c1 value.
00:47
Poisson value is equals to zero.
00:49
So we will end up with theta dash is equals to alpha t.
00:54
Now we are going to integrate this value so that we get theta is equals to theta t square by 2 plus c2.
01:05
Here we are going to substitute c2 value as pi by 4.
01:10
So we get theta is equals to alpha t square by 2 plus pi by 4.
01:19
Now we know that now we are going to consider theta is equals to 3 pi by 4.
01:29
Now we are going to substitute this value 3 pi by 4 is equals to alpha t square by 2 plus pi by 4...