Inertia - Lead Brick And Hand
To illustrate inertia of rest in a dramatic way.
Lead brick and hammer; dry ice and beaker of water are optional.
Drama can be added by palming a bit of dry ice before dipping your hand into the water to "dissipate the energy transferred to your hand during the collision."
None. (Allow 15 min. to obtain dry ice if requested.)
Place the lead brick gently on your fingers and strike the lead brick sharply with the hammer. The inertia off the lead brick prevents damage to your fingers.◙
Gerald L. Hodgson, Weight Distribution in a Bed of Nails Sandwich, TPT 13, 52, (1975). Herbert H. Gottlieb, Inertia of a Building Block, TPT 14, 119, (1976).