00:01
Hello, here a simple pendulum is constructed by a mass of 2 .1 kilogram and it has a length of 2 .29 meters.
00:11
The small angle is 11 .9 degree.
00:17
First, we have to calculate the period, that is 2 pi square roots of l over g.
00:43
That is 3 .04 seconds.
00:46
Now, we have to determine the magnitude.
00:51
Of this returning force at the moment of t0 so that this force is mg sine teta, where teta has to be in radiance.
01:54
That is roughly 4 .3 newtons.
01:57
Now we have to determine the maximum speed.
02:03
Here, angle of frequency is square root of g over l, and the height which above the ground is l times 1 minus cosine theta...