Lie down on a bed of nails and have someone smash a cinder block on your chest (really).
Yes – with some effort.
Relationship between force and pressure, impulse and momentum.
Download video (right-click and “save link as”): Bedofnails.m4v
NCEA & Science Curriculum
SCI 1.1, PHYS 2.4
Carefully lie down on the bed of nails, being sure to distribute your weight at each step. Pillow and foot supports are needed. The video shows how to climb on and off.
Climb on and off carefully and be sure to wear a safety mask if a cinder block will be smashed (see video). Cinder blocks break easily. You do not need to hit it very hard.
Individual teachers are responsible for safety in their own classes. Even familiar demonstrations should be practised and safety-checked by individual teachers before they are used in a classroom.
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This apparatus was borrowed from Murray Chishlom at Sacred Heart College in Lower Hutt near Wellington
This teaching resource was developed with support from