00:01
In this question, we have been told that the angular speed of a propeller increases with constant acceleration from 16 radian per second to 38 radian per second in two revolutions.
00:11
We need to find out how many radians are in two revolutions.
00:15
So, first of all, we are basically going to use the ratio method.
00:18
We know that in one revolution, there is 2 pi radian.
00:24
So, in two revolutions, there is going to be x.
00:29
So, x is going to be equal to, we are going to cross multiply, x is going to be equal to 2 pi multiplied by 2, which is 4 pi radian.
00:42
So, in two revolutions, basically, there are 2 pi radians, oh sorry, 4 pi radians.
00:50
Now, in the next part, we need to find out the angular acceleration of the propeller.
00:56
For this, we are going to use the equation of motion, which is 2as equals 2b square minus u square.
01:02
So, this is basically for translation motion, we can convert this equation for angular.
01:08
So, 2 acceleration is going to be angular acceleration alpha, the displacement is going to be the angular displacement theta, the final speed is going to be the final angular speed minus the initial angular speed...