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Hi.
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Here in this given problem, first of all this is the rotating pole and the two strings attached with it which are holding a ball.
00:14
So the ball is revolving in a horizontal circle like this.
00:26
Here the length of the each string that is 1 .0 meter and the length of pole that is also 1 .0 meter.
00:35
So half of its length that will be.
00:39
0 .50 meter from upper and lower end of the pole to its center.
00:45
Each will be 0 .50 meter.
00:49
So each angle will be same here.
00:53
Angle theta supposed to be tension in the upper string, suppose that is t1.
01:01
T tension in the lower string suppose it to be t2.
01:04
If the mass of the ball is m, so its weight will be acting vertically down mg, then component of t1, horizontal component t1, cous theta 1, similarly horizontal component of t2, that is t2, cost, theta, 2, and vertical component of t1, that is t1, sine theta 1, and vertical component of t2, that is t2, sine theta 2.
01:43
Now the values mass of the ball that is 0 .250 kilogram...