Practice Problems
Description of Motion - Scalar vs Vector Quantities
Directions:
On this worksheet you will practice with the basic definitions of introductory motion.
omit
Question 1
A bike messenger traveled 3 blocks North, 7 blocks East, 5 blocks South, and finally 11 blocks West in order to deliver a package in the traffic, congested city. If his trip took 42 minutes, what was the magnitude of his average velocity in blocks/minute?
6.19 x 10
^{-1}
4.47 x 10
^{0}
1.06 x 10
^{-1}
2.6 x 10
^{1}
1.43 x 10
^{-1}
omit
Question 2
If the messenger in
Question #1
could have traveled directly to his destination, what would have been the direction of his net displacement?
155.9 deg
153.4 deg
204.1 deg
206.6 deg
116.6 deg
omit
Question 3
The magnitude of an object's average velocity can ONLY equal the magnitude of its average speed when the object is
traveling in successive
directions that change by 90º
standing still
traveling in a
straight line
traveling in a circle
omit
Question 4
A scalar is a quantity that can be completely described by stating its
size and direction
size
direction
omit
Question 5
A family taking a vacation traveled 7 hours at 65 mph and then 3 hours at only 50 mph. What was their average speed during this trip?
60.5 mph
54.5 mph
53.5 mph
57.5 mph
omit
Question 6
Which quantity is NOT a scalar?
distance
acceleration
time
mass
omit
Question 7
Which description of an object's motion is more specific: moving at a constant speed or moving at a constant velocity?
constant velocity since it demands that the object
not only move at a constant rate,
but also maintain a constant direction
the two terms are completely equivalent
constant speed since it demands that the object
has to maintain a constant rate
regardless of its direction of motion
omit
Question 8
A student warming up for practice travels one full circuit, 400 meters, around the track. Initially he jogs 84 meters at 1.5 m/sec, then runs 252 meters at 2.2 m/sec, and finally cools down by finishing the final 64 meters at 1.0 m/sec. What was his average speed?
1.86 m/sec
1.57 m/sec
2.35 m/sec
1.71 m/sec
omit
Question 9
What was the student's average velocity in
Question #8
?
cannot be determined
the same as his average speed
0 m/sec
omit
Question 10
During a 30 minute period of time, one car moves at a constant velocity of 45 mph, N, while a second car moves at a constant velocity of 45 mph, W. During this time interval, the cars would have the same
A. instantaneous speed
B. instantaneous velocity
C. displacement
D. acceleration
A and D
C and D
B and D
A and C
B and C
omit
Question 11
A moving van completes its journey of 630 kilometers in 11 hours. Approximately how far should it have traveled 7.5 hours after beginning its trip?
200 km
293 km
84 km
430 km
PhysicsLAB
Copyright © 1997-2020
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton