What I created
Here I have created a pendulum that loses momentum as it swings. The hand initially starts at the top and swings from right to left. To make it realistic, it loses momentum from each swing at it comes to a stop at the end. Although there are some minor stutters, they are not very noticeable.
Problems I encountered
The only problem I encountered was getting the initial swing to look natural. I used quite a few frame keys in order to make the animation smooth.
Daniel Porter 