• University of Illinois, Urbana Champaign

• PHYS 225

Physics 225 Midterm Exam

Tuesday, March 15, 4:00 pm – 5:00 pm

This is a closed book exam. No use of calculators or any other electronic devices is allowed. Work the

problems only in your answer booklets only. The exam questions will be collected at the end, but unless

you are explicitly told otherwise, anything you write on these question pages will not be graded.

You have 60 minutes to work the problems.

At the beginning of the exam:

· Write your name and netid on your answer booklet(s).

· Put away all calculators and cell phones, and make sure your cell phones are off.

During the exam:

· Show your work and/or reasoning. Answers with no work or explanation get 0 points.

· Attempt all the questions! If you get stuck, move on to the next question and come back later.

The worst thing you can do is stall on one question and not get to others whose solution may be

very simple. All question parts on this exam are independent, i.e. you can get full points on

any part even if your answers to all the other parts are incorrect.

· It is fine to leave answers as radicals or irreducible fractions (e.g. 10 3 or 5/7).

· Specify the units for all numerical answers.

· Don’t write long essays explaining your reasoning. We only need to see enough work to

confirm that you understand what you’re doing and are not just guessing.

· Partial credit will be given for incorrect answers provided that the work is legible and

understandable, and some of it is correct. If you think you’ve made a mistake but can’t find it,

explain what you think is wrong: you may well get partial credit for noticing your error!

When you’re done with the exam:

· Turn in EVERYTHING: your answer booklet AND the exam questions

Academic Integrity:

The giving of assistance to or receiving of assistance from another person, or the use of unauthorized

materials during University Examinations can be grounds for disciplinary action, up to and including

expulsion from the University.

Please be aware that prior to or during an examination, the instructional staff may wish to rearrange

the student seating. Such action does not mean that anyone is suspected of inappropriate behavior.

The Formula Sheet is on the last page of the exam booklet.

Throughout this exam, feel free to drop factors of c during your calculations

if you feel comfortable doing so. However, you must put the c’s back correctly

in your final answers (in units and/or expressions), or points will be deducted.