Chapter 8 Engineering Fundamentals:
An Introduction to Engineering
1. A car starting from rest has a constant acceleration of 4 meters per second per second. How
fast will it be going in 5 seconds?
a.
s
m
25.1
b.
s
m
4
c.
s
m
5
d.
s
m
20
Analysis:
2. A car starting from rest has a constant acceleration of 4 meters per second per second. How
long will it take to reach a speed of
s
m
20
?
a.
sec25.1
b.
sec4
c.
sec5
d.
sec20
Analysis:
3. Ten seconds after starting from rest, a car is moving at
s
m
40
. What is the car’s acceleration in
meters per second per second?
a.
2
2s
m
b.
c.
2
6s
m
Engineering Fundamentals, 5th ed. Chapter 8
Saeed Moaveni
d.
2
8s
m
Analysis:
4. Comparing average velocity and instantaneous velocity,
a. average velocity is not a vector quantity and therefore doesn’t include direction.
b. both terms sometimes refer to the same quantity.
c. the two terms never refer to the same quantity.
d. none of the above apply.
Analysis:
5. Comparing average acceleration and instantaneous acceleration,
a. average acceleration is not a vector quantity and therefore doesn’t include direction.
b. both terms sometimes refer to the same quantity.
c. the two terms never refer to the same quantity.
d. none of the above apply.
Analysis:
6. A car travels along a certain road at an average speed of 60 m/s and returns along the same
road at an average speed of 20 m/s Calculate the average speed for the round trip.
Engineering Fundamentals, 5th ed. Chapter 8
Saeed Moaveni
a.
mph20
b.
mph30
c.
mph40
d.
mph50
e.
mph60
Analysis:
7. A thunderstorm is brewing in the distance. Upon seeing a flash of lightning you begin
counting the seconds until you hear the thunder and notice that it took 5 seconds for the sound of
thunder to reach you. Assuming the speed of sound in air to be
s
m
340
, how far away was the
lightning strike?
a. 1.7 km
b. 2 km
c. 5 km
d. 10 km
Analysis:
8. A unit of measure commonly used to quantify air flow is cfm. What does cfm stand for?
a. Correct Fan Measurement
b. Cubic Fan Measurement
c. Cubic Feet per Minute
Engineering Fundamentals, 5th ed. Chapter 8
Saeed Moaveni
9. A unit of measure commonly used to quantify liquid flow is gpm. What does gpm stand for?
a. Global Positioning Mechanism
b. Gallons per Minute
c. Greenhouse Pressure Measurement
Analysis:
10. Time is a fundamental dimension.
a. True
b. False
11. A bee flies from a petunia to a marigold at an average speed of 3 meters per second.
Immediately upon reaching the marigold the bee turns around and flies back to the petunia at an
average speed of 6 meters per second, following his original path. What was the bee’s average
speed for the round trip?
a. 3 meters per second
b. 4 meters per second
c. 4.5 meters per second
d. 6 meters per second
12. A car traveling at a constant speed as it rounds a curve is not accelerating.
13. While filling up your car with gasoline, you notice that it takes 2 minutes to dispense 15 liters
of gasoline. What is the average flow rate in lpm?
a. 2
b. 7.5
c. 15
d. 30
14. It takes 10 seconds to fill a ¼ liter jar with water from your kitchen faucet. What is the flow
rate, in lpm, from the faucet?
a. 1.5
b. 4
c. 10
d. 40
15. A floating leaf bobs up and down two complete cycles each second as water waves pass by
five meters apart. How fast are the waves moving?
a.
s
m
10
b.
s
m
20
c.
s
m
30
d.
s
m
40
16. The “pitch” of a musical note is most closely associated with a sound wave’s
a. period.
b. amplitude.
c. wavelength.
d. frequency.
17. 1. If the length of a vibrating string is increased, while all other parameters remain the same,
the frequency of oscillation
a. increases.
b. decreases.
c. remains the same.
18. If the tension of a vibrating string is increased, while all other parameters remain the same,
the frequency of oscillation
a. increases.
b. decreases.
c. remains the same.
Analysis:
19. A car traveling at a constant speed as it rounds a curve is not experiencing angular
acceleration.
T
20. If you pull a pendulum back and let it go, the time required for it to return to approximately
the same place from which it was released is called
a. the period.
b. the frequency.
c. the natural frequency.
d. the amplitude.
21. Period and frequency mean the same thing.
22. If a bee flies from a petunia to a marigold, and then returns to the petunia,
a. his average position was zero.
b. his average speed was zero.
c. his average velocity was zero.
d. his average acceleration was zero.
23. If a bee flies from a petunia to a marigold, and then returns to the petunia,
a. his average speed was greater than his average velocity.
b. his average velocity was greater than his average speed.
c. his average speed was equal to his average velocity.
Analysis: