Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.
|
|
|
Math Forum
»
Discussions
»
Courses
»
ap-calculus
Notice: We are no longer accepting new posts, but the forums will continue to be readable.
Topic:
[ap-calculus] Units of RADIANS per Second--Related Rates Problem
Replies:
0
|
 |
|
|
|
[ap-calculus] Units of RADIANS per Second--Related Rates Problem
Posted:
Oct 19, 2012 6:00 PM
|
|
NOTE:
This ap-calculus EDG will be closing in the next few weeks. Please sign up for the new AP Calculus
Teacher Community Forum at https://apcommunity.collegeboard.org/getting-started
and post messages there.
------------------------------------------------------------------------------------------------
I have a question about the units in a related rates problem. I insist on using units throughout a related rates problem to reinforce the proper set-up and understanding of an application problem.
When dealing with a rate of change of angle problem, how do units of radians/second suddenly appear? For instance, when we have the classic falling ladder problem:
cosA = (x ft)/(13 ft) and dx/dt = 2 ft/sec at the moment when x = 5 ft
How does dA/dt acquire units of RADIANS/sec?
Leanne Wied-Brusky
Mathematics Department
Brookfield East High School
Brookfield, Wisconsin 53005
---
To search the list archives for previous posts go to
http://lyris.collegeboard.com/read/?forum=ap-calculus
|
|
|
|
