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Re: [Phys-l] [PTSOS] anvil and sledgehammer inertia demo

The two force probes on a cart with a dragged dead weight on one side pulled
at a constant speed might be a good demo.

But a balanced object that spins is way too complicated, even though it is
an example of balanced forces with constant V. Students generally won't
perceive this as a NTN1 or NTN2 example.

The bathroom scale demo has the defect that you can't directly measure what
the other force is. It might be worthwhile after less ambiguous demos. To
be convincing the demo has to be believed by the students.

John M. Clement
Houston, TX

One has been affixed in an elevator at UCSB for about two decades.

bc also, IHRC, one at the Naval Postgrad. School.

p.s. Also an equal arm balance w/ Al and steel weights. (UCSB)

On 2010, Oct 03, , at 07:59, Ken Fox wrote:

Two I like:
Riding an elevator while standing on an analog bathroom scal