Name: ________________________ Class: ___________________ Date: __________
Exam 1--PHYS 151--S15
True/False
Indicate whether the statement is true or false.
1. In order to continue at a constant velocity, you
must exert a constant net force.
6. The force due to static friction is usually less than
that due to kinetic friction.
2. If the net force on an object is zero, the object must
be stationary.
7. The force is a measure of an object’s inertia.
8. Mercury is a good fluid to use in barometers
mainly because of its silver color and high
visibility.
3. The normal force for an object on a surface is
always equal and opposite the weight of that
object.
9. After traveling through the systemic circuit, blood
returns to the right atrium.
4. The synovial joint is a joint where the bone twists
along its long axis.
10. Systolic pressure is usually higher than diastolic
pressure.
5. Skeletal muscles control the large, external motion
of the body.
11. Glaucoma is a condition where the intraocular
pressure is too high.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
14. Newton’s second law is called the law of
_______________.
a. inertia
b. force
c. reaction
d. acceleration
12. Consider this equation. What are the units of f?
(g has units of seconds ; p has units of meters)
p = fg
a.
b.
c.
d.
m/s
s
ms
s/m
15. Friction is a force that _________________of
motion of two objects as they slide or attempt to
slide across each other.
a. is perpendicular to the direction
b. is in the same direction
c. opposes the direction
13. The unit of time is based on which of these
physical quantities in the SI system?
a. the speed of light
b. the rotation of the earth
c. a particular clock in France
d. the vibrations of a cesium atom
1
16. Which of these is not a function of bones?
a. support of the body
b. protection of the body
c. to act as a lever when moving the body
d. to store minerals for the body
e. all of these are functions of bones
21. Consider these body parts. What type of lever are
they (in order from left to right)?
17. Which of these is not a force given in chapter 1?
a.
b.
c.
d.
e.
driving
friction
normal
weight
tension
a.
b.
c.
d.
22. Consider these levers. The block on each is the
same mass. Which lever requires the most force, F,
to hold the block up as shown?
18. The unit of time is based on which of these
physical quantities in the SI system?
a. the rotation of the earth
b. a particular clock in France
c. the vibrations of a cesium atom
d. the speed of light
19. Two objects collide. One of the objects has a much
larger mass than the other. This larger object will
exert a force that is __________ the force exerted
by the smaller object.
a. larger than
b. smaller than
c. the same as
d. not enough information; it depends how fast
the objects are travelling
a.
b.
c.
a
b
c
23. My mass is about 70 kilograms. What is my
weight?
a. 7 N
b. 70 N
c. 700 N
d. 7000 N
e. 70 kg is a measure of weight
20. Label each of these levers as either first, second, or
third class.
a.
b.
c.
d.
2,3,1
3,2,1
1,3,2
1,2,3
a:3; b:2; c:1
a:1; b:2; c:3
a:3; b:1; c:2
a:2; b:1; c:3
2
24. This figure shows a wedge of wood. Which arrow
points closest to the center of gravity?
a.
b.
c.
d.
30. A 50 pound child sits at the end of a seesaw, 2
meters from the fulcrum. Where must a 100 pound
child sit to balance the seesaw?
a. 2 meters from the fulcrum
b. 0.1 meters from the fulcrum
c. 1 meter from the fulcrum
d. 0.5 meters from the fulcrum
Ê
ˆ
31. The flow rate ÁÁÁ Q = ∆V ˜˜˜ has which of these
∆t
Ë
¯
units?
a. m3/s
b. ms
c. m/s
d. m/s2
A
B
C
D
32. Water flows with speed v through a pipe, whose
cross-sectional area is A. If the area of the pipe
decreases to A/2, what is the new speed of the
water?
a. v/2
b. v
c. 2v
d. 4v
25. It is 20 miles to the nearest store. If a slarp is 5
miles, how many slarps is it to the store?
a. 100 slarps
b. 0.25 slarps
c. 4 slarps
d. 25 slarps
26. Which of these is the best way to move your friend
on a sled?
a. pull up at an angle from the front
b. push down at an angle from behind
c. both are the same if the angle is the same
33. When the heart contracts, blood quickly flows from
one region to another, causing a distinctive sound
heard with a stethoscope. What type of flow
causes this sound?
a. laminar
b. irrotational
c. turbulent
d. viscous
27. You hold a 30 newton weight in your hand with
your elbow bent at 90 degrees. Your bicep exerts a
force to hold up the weight. Is this force...
a. more than 30 N
b. less than 30 N
c. equal to 30 N
34. When you inhale, your chest cavity gets
_____________; this causes a _________ pressure
in your lungs than outside your body. Then, air is
able to enter your lungs.
a. bigger, bigger
b. bigger, smaller
c. smaller, bigger
d. smaller, smaller
28. An isometric contraction occurs when the tension
in the muscle increases and ___________.
a. the muscle doesn’t get shorter
b. neither of these
c. the muscle does get shorter
29. Which of these scenarios has the most friction?
a. car tires on ice
b. car tires on dry asphalt
c. car tires on wet asphalt
3
35. There are three sources of pressure; two of these
are: 1) molecular interactions within a fluid and 2)
an external force applied to a fluid. What is the
third source of pressure?
a. a fluid changing into a solid
b. increased length fluid’s container
c. the weight of a fluid
d. density of a fluid
39. Boyle’s law states that which of these quantities is
constant?
a. pressure/mass
b. amount of gas*temperature
c. density of gas
d. pressure*volume
40. If you want to administer medication via an IV, you
would insert the needle into a/an __________
because the pressure there is ________ than
elsewhere in the systemic circuit.
a. artery, higher
b. artery, lower
c. vein, higher
d. vein, lower
36. Consider this artery, which is partially blocked.
What happens to the speed of the blood flowing
through the blocked section?
a.
b.
c.
41. A tonometer is used to measure pressure of the
fluids in which of these places?
a. synovial joint
b. brain
c. eye
d. bladder
it increases
it decreases
it stays the same
37. Consider the Poisuille equation as it relates to the
systemic circuit. What happens to the overall
blood pressure as a blood vessel becomes partially
blocked?
a. the blood pressure increases
b. the blood pressure decreases
c. the blood pressure stays the same
d. it depends on the type of blockage
42. The Poiseuille equation, given below, describes the
flow rate of an ideal fluid in a cylindrical pipe. A
fluid flows through a pipe at a rate Q. If the length
of the pipe is increased by a factor of 2, what is the
new flow rate?
π r 4 ∆P
Q=
8ηL
a. 4Q
b. 2Q
38. This figure shows a pressure-measuring device. A
dense fluid fills the region shaded gray. Which of
these expressions best characterizes the 2
pressures, P1 and P2?
a.
b.
c.
d.
c.
1
2
d.
1
16
e.
1
4
Q
Q
Q
43. The pulmonary circuit has a ______ pressure than
the systemic circuit because _____.
a. higher, it must deliver blood to the entire body
b. higher, it is closer to the heart
c. lower, it is much shorter
d. lower, it blood vessels are smaller in diameter
P1<P2
P1>P2
P1=P2
P1=0 Pa
4
44. If you weigh 180 pounds and stand on one leg,
what is the pressure on the knee joint that has an
area of 0.5 square inches?
a. 900 psi
b. 360 psi
c. 180 psi
d. 90 psi
48. In the previous figure, which location is the left
atrium?
a. A
b. B
c. C
d. D
e. E
45. According to the Poiseuille equation, a viscous
fluid needs ________ to maintain flow.
a. an increase in height
b. a lengthening of the path
c. a continuous drop in pressure
d. a constriction of the pipe
49. In the previous figure, where is the blood just
before heading off to the lungs?
a. A
b. B
c. C
d. D
e. E
46. The pulmonary circuit ___________.
a. takes blood from the heart to the body.
b. delivers blood to the capillaries.
c. takes blood to the brain.
d. takes blood from the heart to lungs.
e. is a racing circuit for bad drivers.
50. Which of these is my favorite student?
a. Jeff Boudreaux
b. Tyler Thibodaux
c. Victoria Rodriguez
d. Keslie Wiley
e. Me!
47. Consider this diagram of a human heart. Where is
the blood pressure the lowest?
a.
b.
c.
d.
e.
A
B
C
D
E
5
ID: A
Exam 1--PHYS 151--S15
Answer Section
TRUE/FALSE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
ANS:
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F
F
F
F
T
F
F
F
T
T
T
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1
1
1
1
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1
1
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1
1
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1
1
1
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1
1
1
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1
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1
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1
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MULTIPLE CHOICE
12.
13.
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22.
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31.
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34.
35.
36.
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A
D
D
C
E
A
C
C
A
C
B
C
C
C
A
A
A
B
C
A
C
C
B
C
A
REF: S15
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ID: A
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
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A
B
D
D
C
C
C
B
C
D
A
E
C
E
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1
1
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2