http://scienceprojectideasforkids.com/wp-content/uploads/2010/10/inertia-2.jpg

     This picture is very similar to one of the experiments we did today. In the first picture, both the hoop and coin are at rest. When force is applied to the hoop, the hoop moves but the coin remains in the same spot. Due to Newton's first law of physics, we know that an object at rest stays at rest unless a force is acted upon it, therefore the coin stays at rest.