Projects‎ > ‎(1) Discrepant Events‎ > ‎

## Author

Rena Benor

Principles Illustrated : Inertia
1. Object at rest stays at rest
2. Object at rest stays at rest unless acted upon by an outside force.

## PHYSICS1.b  Grade Nine through Twelfth:

• Students know that when forces are balanced, no acceleration occurs; thus an object continues to move at a constant speed or stays at rest (Newton’s first law).

## Questioning Script

Prior knowledge & experience:

Tower of blocks will topple when one is pulled out from below.

Root question:

What will happen to the penny when the card is pulled away?

Target response:

The penny stayed in place and then fell into the cup, because it acted in accordance with the First Law of Inertia; “An object at rest will remain at rest until acted upon by an outside force”.

Common Misconceptions:

Most students will predict that the coin will slide off with the card and go flying.

Coin and tumbler
a Place the coin on the card, and place the card over the open end of a beaker.
b Flick the card away sharply and observe the effect of the coin's motion.

## References

Nuffield Foundation  IOP Institute of Physics

www.nuffieldfoundation.org/