Time and Date Stamps (logged): 17:12:20 06-10-2020
°¶Ÿ°±Ÿ±¯¯µŸ°¯Ÿ±¯±¯
Precalculus II
Technical Physics (Phy 111) Final Exam
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:
. . . . .
. . . .
. . . .
. . .
.
.
.
.
.
.
.
.
.
.
Problem Number 1
An object, initially at rest, is acted upon by a net force of 17220 Newtons.
- The object has mass 14 kilograms.
- During the first 9 seconds, based on its velocity
change, by how much will its KE increase?
- During the first 9 seconds, based on the distance
it travels, how much work is done by the net force on the object?
.
.
.
.
.
.
.
.
.
.
Problem Number 2
The velocity of an object increases by 9 meters per second during its lifetime.
- If the rate of increase is constant, and if during a 1 second lifetime
another object with the same velocity is observed to increase its velocity be 28 meters /
sec, then how long does this object live?
.
.
.
.
.
.
.
.
.
.
Problem Number 3
An ideal spring has an unknown restoring force constant. An mass of 75.51 kg
suspended from the spring is observed to complete a cycle of oscillation in 1.83
seconds. What is the restoring force constant?
.
.
.
.
.
.
.
.
.
.
Problem Number 4
If velocity increases linearly from 6 meters per second to 12 meters per second in 4
seconds, then on the average, by how many meters per second does velocity increase per
second?
.
.
.
.
.
.
.
.
.
.
Problem Number 5
A displacement vector has length 9 and is
directed at an angle with the positive x axis of 11 degrees. What are the
displacements in the x and y direction which would give the same net displacement?
.
.
.
.
.
.
.
.
.
.
Problem Number 6
What is the mass in kilograms of an object which completes 666.6 cycles every
minute when suspended from an ideal spring whose restoring force constant is 850
Newtons/meter?
.
.
.
.
.
.
.
.
.
.
Problem Number 7
Over an interval of .06 seconds, the velocity of an object of constant mass 18 Kg is
observed to change from 4 m/s to 2.08 m/s.
- Find the average force on the
object using the Impulse-Momentum Theorem.
- Verify your results using your
knowledge of uniformly accelerated motion.
.
.
.
.
.
.
.
.
.
.
Problem Number 8
An object is pushed a distance of 13 meters by a force of 3 Newtons, with the force in
the direction of the displacement.
- How many Joules of work are done by the force?
.
.
.
.
.
.
.
.
.
.
Problem Number 9
An object of unknown mass moving at 5 m/s collides
with another object.
- By observing the behavior of the second object we
conclude that the first object must have had momentum 15 kg m/s.
What is the mass of the first object?
.
.
.
.
.
.
.
.
.
.
Problem Number 10
What are x and y the components of the vector obtained when we add force vector
A, with magnitude 9.8 Newtons and angle 320 degrees, to the force vector B whose
angle and magnitude are 206.6 degrees and 3.7 Newtons?
- What are the magnitude and angle of this resultant vector?