Time and Date Stamps (logged): 05:12:04 12-05-2008
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Precalculus II
Technical Physics (Phy 111) Set 5 Test
Completely document your work and your reasoning.
You will be graded on your documentation, your reasoning, and the
correctness of your conclusions.
Test should be printed using Internet Explorer. If
printed from different browser check to be sure test items have not been cut off. If
items are cut off then print in Landscape Mode (choose File, Print, click on Properties
and check the box next to Landscape, etc.).
Name and Signature of Student
_____________________________
Signed by Attendant, with Current Date and Time:
______________________
If picture ID has been matched with student and name as
given above, Attendant please sign here: _________
Instructions:
- Test is to be taken without reference to text or
outside notes.
- Graphing Calculator is allowed, as is blank paper or
testing center paper.
- No time limit but test is to be taken in one
sitting.
- Please place completed test in Dave Smith's folder,
OR mail to Dave Smith, Science and Engineering, Va. Highlands CC, Abingdon, Va.,
24212-0828 OR email copy of document to dsmith@vhcc.edu,
OR fax to 276-739-2590. Test must be returned by individual or agency supervising test. Test is not to be returned to student after it has been taken. Student may, if proctor deems it feasible, make and retain a copy of the test..
Directions for Student:
- Completely document your work.
- Numerical answers should be correct to 3 significant
figures. You may round off given numerical information to a precision consistent
with this standard.
- Undocumented and unjustified answers may be counted
wrong, and in the case of two-choice or limited-choice answers (e.g., true-false or
yes-no) will be counted wrong. Undocumented and unjustified answers, if wrong, never get
partial credit. So show your work and explain your reasoning.
- Due to a scanner malfunction and other errors some
test items may be hard to read, incomplete or even illegible. If this is judged by
the instructor to be the case you will not be penalized for these items, but if you
complete them and if they help your grade they will be counted. Therefore it is to
your advantage to attempt to complete them, if necessary sensibly filling in any
questionable parts.
- Please write on one side of paper only, and staple
test pages together.
Test Problems:
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Problem Number 1
You walk along level ground in a straight line from
some initial point to some terminal point.
If I walk 1.7 miles to the East, then I will be
directly South of your terminal point. Your terminal point will lie 6.61 miles to the
North.
- What angle does your path make with East?
- How far did you walk?
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Problem Number 2
A displacement vector has length 2 and is
directed at an angle with the positive x axis of 75 degrees. What are the
displacements in the x and y direction which would give the same net displacement?
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Problem Number 3
What are x and y the components of the displacement
vector obtained when we add the two following displacement vectors:
- vector A, with x and y components 7.1 meters and
3.6 meters, and
- vector B whose x and y components are -.6000001 meters
and 7.1 meters?
What are the magnitude and angle of the resultant
vector?
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Problem Number 4
A shell is fired from a cannon and follows a
somewhat parabolic path until it returns to the ground.
At a certain instant the horizontal component of
its velocity are, respectively, 1.65 meters per second and 1.85 meters per second.
- Aided by a sketch, find the magnitude and angle of
the velocity of the shell with horizontal.
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Problem Number 5
What are x and y the components of the displacement
vector obtained when we add the two following displacement vectors:
- vector A, with x and y components -2 meters and
8.5 meters, and
- vector B whose x and y components are 2.9 meters
and 7.8 meters?
What are the magnitude and angle of the resultant
vector?