The blog is setup to answer questions about the class, homework, exams, and engineering in general.

 
Problem 3.14 - Solution



Some people are having problems coming up with the solution to this problem. I have put together a solution with free-body diagrams and calculations.
posted by Dr. E at 2:34 PM

 
Help Session


Jason has volunteered to run help session in Rm 137 of the Civil Engineering Building at 6 PM tonight.
posted by Dr. E at 7:36 AM

 
Finding Angle between Two Vectors

A question has come up on how to compute the angle between two vectors in 3-D space. You will need use the formula

where, a is the angle between the two vectors and A*B is the dot product, which is a scalar value and |A| and |B| are the magnitudes of the vectors.
posted by Dr. E at 1:53 PM

 
Powerpoints - Availability

A question

In ENGR 111 and ENGR 112 the powerpoint slides were available for
purchase in the Wisenbaker Copy Center. That way we could have a copy of all
the powerpoint slides without having to waste expensive ink and paper. I was
wondering if you were planning on doing the same for the notes for ENGR 221.
If you would consider it, I would greatly appreciate it as they were
invaluable study materials for tests.

Short answer: No.

Long answer: This semester is the first time that I have taught this course and I will need to
develop the powerpoints as the semester progresses. I will try to get my lecture on the web
before the beginning of class, so that you can make a printout.
posted by Dr. E at 11:46 AM

 
Problem 2-37- Question

The question is:

... I have my X and Y column with...

Force	X component	Y component
Fu	Fu cos 30	Fu sin 30
Fv	Fv cos 320	Fv sin 320

I don't know what to do next. Is the Y column equal to zero?

From the figure, what is the direction of the resultant force? Is there a y component?

posted by Dr. E at 6:44 AM

 
Welcome

Welcome to world of blogging. I have setup this blog to answer class questions and present interesting engineering
material that comes across my desk. I will be upgrading the layout as the semester progresses. Have a good semester.
posted by Dr. E at 6:32 AM