PHYS170 & PHYS171

Course Information on WebAssign

WebAssign is web-based homework utility. Assignments to the class are posted by the instructor and students log on to do the assignments.

To Access WebAssign

Log On to WebAssign
Go to http://webassign.net

Username: this is the same as your LHUP computer username.
Institution: lhup
Password: this will be the same as your username. You can, and should, change this once you log on.
Obtain a WebAssign Access Code
You will have to purchase an Access Code Online

Notes on entering information using WebAssign

1. scientific notation - WebAssign uses scientific notation like that used in calculators. Some examples:

number	scientific notation	WebAssign Notation
12234	1.2234x10⁴	1.2234E+4
0.00344	3.44x10^-3	3.444E-3

Exponents - You may be asked to enter variabls with exponents. For example, L². The way to enter this into your answer is as follows:

L^2

3. precision -Unless the problems states otherwise, WebAssign will allow a 2% tolorance in your answers.

4. angles - WebAssign measures angles from the positive x-axis.

Going counterclockwise from the +x-axis use values from 0 to +180⁰ (positive values).
Going clockwise from the +x-axis use values from 0 to -180⁰ (negative values).

The figure below shows an example. There area 4 vectors. The angles of these vectors, according to WebAssign, would be referenced to the +x axis. WebAssign would say the vectors are located at the following angles:

	WebAssign
	Vector A is located at angle +30^o from the +x axis Vector B is located at angle +150^o from the +x axis Vector C is located at angle -150^o from the +x axis Vector D is located at angle -30^o from the +x axis