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 4 blocks North, 5 blocks East, 6 blocks South, and finally 8 blocks West in order to deliver a package in the traffic, congested city. If his trip took 48 minutes, what was the magnitude of his average velocity in blocks/minute?
7.51 x 10
^{-2}
2.3 x 10
^{1}
4.79 x 10
^{-1}
3.61 x 10
^{0}
1.04 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?
151.0 deg
146.3 deg
213.7 deg
123.7 deg
209.0 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
traveling in a
straight line
traveling in a circle
standing still
omit
Question 4
A scalar is a quantity that can be completely described by stating its
direction
size
size and direction
omit
Question 5
A family taking a vacation traveled 5 hours at 65 mph and then 4 hours at only 49 mph. What was their average speed during this trip?
57.9 mph
56.1 mph
57.0 mph
52.3 mph
omit
Question 6
Which quantity is NOT a scalar?
time
acceleration
distance
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?
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
constant velocity since it demands that the object
not only move at a constant rate,
but also maintain a constant direction
omit
Question 8
A student warming up for practice travels one full circuit, 400 meters, around the track. Initially he jogs 96 meters at 1.5 m/sec, then runs 288 meters at 2.2 m/sec, and finally cools down by finishing the final 16 meters at 1.0 m/sec. What was his average speed?
1.57 m/sec
1.98 m/sec
2.35 m/sec
1.90 m/sec
omit
Question 9
What was the student's average velocity in
Question #8
?
0 m/sec
the same as his average speed
cannot be determined
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 C
C and D
B and D
B and C
A and D
omit
Question 11
A moving van completes its journey of 720 kilometers in 8 hours. Approximately how far should it have traveled 5.5 hours after beginning its trip?
340 km
131 km
495 km
225 km
PhysicsLAB
Copyright © 1997-2024
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton