[Phys-L] Re: Reaction Time (was Re: Human Error?)

[Robert Cohen <Robert.Cohen@PO-BOX.ESU.EDU>]

What are you trying to measure: the amplitude or the period?

____________________________________________________
Robert Cohen; 570-422-3428; www.esu.edu/~bbq
East Stroudsburg University; E. Stroudsburg, PA 18301


> -----Original Message-----
> From: Forum for Physics Educators
> [mailto:PHYS-L@list1.ucc.nau.edu] On Behalf Of Rick Tarara
> Sent: Monday, May 02, 2005 11:15 AM

> Certainly not for timing a pendulum, especially hand timing.
> The maximum amplitude points are where the pendulum spends
> the most time--so the motion is slower (although the
> acceleration is maximum) and it is easier to judge the 'end
> points'.  Electronic timing might well use the equilibrium
> position, but I would never have students use it for hand timing.
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