Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Foo Off-Topic chit chat with no general subject.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-03-07, 08:48 PM   #1
MattP.
Obeying Gravity
Thread Starter
 
Join Date: Oct 2004
Location: Bellingham, WA
Bikes:
Posts: 2,962
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
High school physics lab question

Hey all,

Working on a lab report for my physics lab and had a quick question. In the lab, you set up a motion detector, drop a ball, examine the velocity, acceleration, and what not. The question is:

How precisely can the MD measure time? How precisely can it measure distance?

WHen we recorded a value, the motion detector took it out to the thousandths place. WOuld that be the answer. "The MD is precise down to the thousandth of a second." I always thought that precision was how close a value was to other similar values...

A little confused as what to put, any help is excellent!
MattP. is offline   Reply With Quote
Old 09-03-07, 09:00 PM   #2
Cypress
Giving you the business.
 
Cypress's Avatar
 
Join Date: Jan 2006
Location: Corvallis, Oregon
Bikes: Ridley Noah, Giant Trinity Advanced, Specialized Crux
Posts: 4,441
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If time is the unit of measure for your accuracy, then yeah, "The MD is accurate to 1/thousandth of one second".
__________________
Quote:
Originally Posted by Moderator
Dear Cypress,

You have received an infraction at Bike Forums.
Cypress is offline   Reply With Quote
Old 09-03-07, 10:44 PM   #3
mcoine
Senior Member
 
Join Date: Dec 2005
Location: southern oregon
Bikes:
Posts: 2,631
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by MattP. View Post
I always thought that precision was how close a value was to other similar values...
You're correct. Accuracy and precision are two different things. Accuracy is how close to the true value you are. Precision has to do with repeatability. You would have to do a number of tests and run some sort of anova (analysis of variation) to determine the precision.
mcoine is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 08:51 AM.