A Bed of Nails

Description:  Special caution should be taken when sitting down or getting up from a bed of nails. In this video Steve Spangler used a motor to lift the entire bed of nails up and down safely. Each of the nails is pushing on the participant but since there are so many nails the force is distributed safely between all of the nails. This demonstration could be used in any physics unit discussing forces and pressure.

Web Resource:  Bed of Nails - Wikipedia