Study Task 2 - 3D - 'Swingers'

Today I finished the first draft of my swinging pendulum videos for Study Task 2, I know that in order to improve on the videos below, I need to make the video for my second pendulum longer so that it plays for a better amount of time and I also need to stretch out the key frames of my third pendulum, so that it swings in a much smoother motion. Here is my work so far:

Pendulum 1 = A standard Pendulum Swinging

Pendulum 2 = Segmented Pendulum Swinging

Pendulum 3 = Segmented Pendulum (that must accelerate from a standstill and then come to an abrupt halt)