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Material Type: Exam; Professor: Coats; Class: University Physics I; Subject: Physics; University: Laredo Community College; Term: Fall 2004;
Typology: Exams
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Print your name on the back along the upper right-hand edge of the paper. Do not write
your name anywhere on the front of the exam.
Use dark lead pencil only: no pens, no colored inks.
Use the backs of the exam sheets for scratch paper. Do not use any other paper for this
exam. Do not mark the formula sheet unless told to do so.
Strong Suggestion - - Read the entire exam. Do the problems you know you can do first. Next
do the problems you think you can do. Anything else is last.
4 Acceleration
4 Average Speed
4 Average Velocity
4 Displacement
4 Distance
4 Frame Of Reference
4 Instantaneous Speed
4 Position
4 Scalar
4 Speed
4 Vector
4 Velocity
(A) Change in position
(B) Change in position over change in time.
(C) Change in velocity over change in time.
(D) Direction only
(E) Distance and direction from a reference point.
(F) Distance per time
(G) Length without direction
(H) Magnitude and direction
(I) Magnitude only
(J) Required to describe position, displacement, speed, and
acceleration. Often indicated by coordinate axis.
(K) Speed at an instant. (Speedometer speed)
(L) Total displacement divided by total time.
(M) Total distance divided by total time.
difference as indicated. (Note: Both sum and difference vectors must start from the
origin for full credit.)
v
v
v
v
v
v
v
v
v
v
Vector Scalar
displacement
distance
force
mass
position
pressure
speed
time
velocity
weight
X- and Y- components and express in unit vector form. (10pts@)
(a) ( 135 km, 53 °)
(b) ( 640 m/s, 230 °)
its magnitude and direction. (Sketch 2pts, Magnitude & Direction 5pts@)
(a)
v
A = (2.83 m )
i + ("1.27 m )
j
(b)
v
V = (12.3 m / s )
i + (16.4 m / s )
j
velocity versus time. (5pts)
position versus time. (5pts)
velocity vector in the north/south and east/west directions. (5pts)
ans:
direction of its displacement? (Indicate direction as an angle east or west of north.)
(5pts)
ans:
x
v
t
t
x
v
t
t