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Exam 3 for University Physics I | PHYS 2425, Exams of Physics

Material Type: Exam; Professor: Coats; Class: University Physics I; Subject: Physics; University: Laredo Community College; Term: Fall 2004;

Typology: Exams

Pre 2010

Uploaded on 08/18/2009

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Physics 2425 (Coats) - Exam 3 - Fall 2004
> 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.
1. Matching:
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.
2. Graphic Vector Addition & Subtraction: For the following, sketch the sum or
difference as indicated. (Note: Both sum and difference vectors must start from the
origin for full credit.)
!
v
A +
v
B
!
v
A "
v
B
!
v
B +
v
A
!
v
B "
v
A
!
v
A +
v
B
A
A
B
A
B
A
B
B
B
pf3
pf4

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Download Exam 3 for University Physics I | PHYS 2425 and more Exams Physics in PDF only on Docsity!

Physics 2425 (Coats) - Exam 3 - Fall 2004

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.

  1. Matching:

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.

  1. Graphic Vector Addition & Subtraction: For the following, sketch the sum or

difference as indicated. (Note: Both sum and difference vectors must start from the

origin for full credit.)

v

A +

v

B

v

A "

v

B

v

B +

v

A

v

B "

v

A

v

A +

v

B

A

A

B

A

B

A

B

A

B

B

  1. Indicate which of the following are vector quantities and which are scalar. (1pt@)

Vector Scalar

displacement

distance

force

mass

position

pressure

speed

time

velocity

weight

  1. For the following vectors in (magnitude, direction from X-axis) form, determine the

X- and Y- components and express in unit vector form. (10pts@)

(a) ( 135 km, 53 °)

(b) ( 640 m/s, 230 °)

  1. For each of the following vectors in unit vector form, sketch the vector and determine

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

  1. For the following graph of position versus time, determine the corresponding graph of

velocity versus time. (5pts)

  1. For the following graph of velocity versus time, determine the corresponding graph of

position versus time. (5pts)

  1. A jet is traveling at 587 km/h at 28 ° west of south. Find the components of its

velocity vector in the north/south and east/west directions. (5pts)

ans:

  1. A bus is driven 128 km north and then 87 km east. What is the magnitude and

direction of its displacement? (Indicate direction as an angle east or west of north.)

(5pts)

ans:

x

v

t

t

x

v

t

t