To give students a common experience from which to commence force concepts, we played Broom Ball:
To get a real taste of the action, check out the video below:
Objects at rest tend to stay at rest unless acted upon by a non-zero net force, so I just need to pull this tablecloth from under these dishes without any upward force..
This massive cinder block placed on my stomach should resist any change in its state of motion due to a student hitting it with a hammer. At least I hope it will, or I may be going to the hospital...