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Greetings everyone. I'm looking for suggestions/advice for a lab. Weare
currently going over potential/kinetic energy and recently covereddown
idea I have (that I'm certain others had done) was to roll a marble
plastic tube. The marble then would roll across and off of the labtable
and hit the floor at a certain spot. Based upon knowing how high thetube
is from the table, they can calculate the speed of the marble as itexits
the tube and rolls across the table. Knowing the speed of the marbleand
height of the lab table, they should be able to figure the range of thepoints.
marble. To add some fun to it, I also planned on having them place
bulls-eye of where they think it'll land...each ring was worth some
When I've tested the setup, I'm not getting very good results. Mysetup was
the following: top of the plastic tube was 60cm from the top of thelab
table, 90.07cm from the lab table to the floor, and the marble's rangewas
97cm. I figured that it should've landed 147cm from the edge of thelab
table (about 34% error). I've tried different tube heights and myerror
would fluctuate (the best being 24% error).
I'm curious if others had done something similar and suggestions for
improving my setup.