Re: pinhole Re: Objects Dropped from Tall Buildings

Date view Thread view Subject view Author view Attachment view

From: Paul Doherty (pauld@exploratorium.edu)
Date: Wed Jan 22 2003 - 07:59:02 PST 

Message-Id: <l03110726ba546fd3c93a@[192.174.3.125]>
Date: Wed, 22 Jan 2003 07:59:02 -0800
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole Re: Objects Dropped from Tall Buildings

Here's an experiment to find the terminal velocity of a penny.
Glue a penny to a 30 cm length of string.

Hold the string with the penny hanging from it in an airstream, e.g. out
the window of a car. change speed until the strinng makes a 45 degree angle
with the vertical.
Now the air resistance is equal to the gravity force and you arre driving
at the terminal velocity of thhe penny.

Paul D

Date view Thread view Subject view Author view Attachment view

This archive was generated by hypermail 2.1.3 : Mon Aug 04 2003 - 16:18:11 PDT