Summary: This learning objective exemplifies the effect of frictional forces on spring systems. The amplitude is reduced exponentially, eventually coming to a complete stop over time. This is also known as damped simple harmonic motion. Damped SHM is compared against regular simple harmonic motion to showcase the difference in (change in) amplitude in a given time with and without frictional force acting on it. (Presented as a word problem through Microsoft Word)
http://www.slideshare.net/KatrinaLim17/physics-lo2-44139808