Inertia of Rest Concept

Demonstrations in Inertia of Rest

Large styrofoam boulder with realistic rough, weathered surface on the forks of a yellow hydraulic forklift in a classroom
Safety

Acceleration, Mass

Demonstrates that acceleration is proportional to mass . Contrasting the effort to lift a heavy rock versus a realistic-looking styrofoam boulder gives students a visceral sense that mass measures resistance …
Ring stand with horizontal aluminum rod and hook; a black cylindrical 1 kg mass hangs from thread, with a hammer suspended below by a second thread

Mass on Thread

Demonstrates inertia by showing that a slow pull on a suspended mass breaks the upper thread, while a swift pull breaks the lower thread. Students see directly how the rate …
Tablecloth place setting with a champagne bottle holding flowers, a plate, teacup, and small bowl on a white cloth draped over a green lecture bench

Tablecloth and Dishes

Demonstrates Newton's First Law: objects at rest remain at rest unless acted upon by a net external force. Rapidly pulling a tablecloth from beneath dishes shows that minimizing contact time …
Daruma Otoshi toy: stacked colored wooden cylinders (green, white, red, pink, blue, yellow) with a painted daruma face on top and a small wooden hammer piece

Inertia Tower Toy (Daruma Otoshi)

Demonstrates Newton's First Law (inertia of rest) using two classic setups: a Daruma Otoshi tower where striking a lower block leaves upper blocks in place, and a cork-on-card-over-bottle where flicking …
Hand holding an index card over a glass bottle with a small weighted cork resting on the card above the bottle mouth

Cork and Bottle

Demonstrates Newton's First Law by snapping an index card out from under a weighted cork balanced over a bottle. The cork's inertia keeps it stationary while the card accelerates away, …