TEST 2-A
PHSC 1013 Physical Science
Dr. Bullock
v = d/t
a = v/t
aC = v2/r
FNET = ma
2.54 centimeter = 1 inch
1 kilometer = 0.62 mile
5280 feet = 1 mile
1 yard = 36 inches
3
1 cm water = 1 gram
 = mass/Volume
gEARTH = 9.8 m/s2
Of the following objects (A, B, C, D and E) in the motion diagrams…
X (m)
V (m/s)
A
C
4
3
2
1
4
3
2
E
B
D
1
1
2
3
4
T (sec)
1
2
3 4
T (sec)
1. Which object is traveling with a constant non-zero velocity?
a) A b) B c) C d) D e) E
2. Which object is not moving?
a) A b) B c) C d) D e) E
3. Which object is traveling with constant non-zero acceleration?
a) A b) B c) C d) D e) E
4. What is the average acceleration of object B over the interval 0-4 seconds?
a) 0 m/s2
b) 0.5 m/s2 c) 1 m/s2
d) 2 m/s2
e) 2.5 m/s2
5. Which object(s) are accelerating?
a) A
b) A, B, E
c) C, D, E
d) D, E
e) E
6. According to Newton's 2nd Law of motion, acceleration...?
a) is proportional to the net force and inversely proportional to the mass
b) is proportional to the net force and inversely proportional to the velocity
c) is proportional to the mass and inversely proportional to the velocity
d) is proportional to the velocity and inversely proportional to the friction
e) is proportional to the mass and inversely proportional to the net force
7. What net force is necessary to get a 150 kg mass to accelerate at 2 m/s2 if the frictional
force is 200 N?
a) 100 N
b) 150 N
c) 500 N
d) 300 N
e) 250 N
8. The acceleration of a car that increases its velocity from 20 to 100 m/s in 5 seconds is:
a) 15 m/s
b) 16 m/s2
c) 5 m/s2
d) 20 m/s2
e) 20 m/s
9. What is the velocity of an object in free-fall that was dropped from rest 6 seconds ago?
a) 600 m/s
b) 60 m/s
c) 6 m/s
d) 5 m/s
e) 0 m/s
TEST 2-A
PHSC 1013 Physical Science
Dr. Bullock
10. A body with a mass of 2 kg is observed to have an acceleration of 4 m/s2. The net force acting
on the body must be:
a) 2 kg-m
b) 6 newtons
c) 1 ft-pound
d) 8 newtons
e) 0.5 newtons
11. The forces shown in the picture below are pulling/pushing the object. What is the net Force
acting on the object?
8 Newtons
9 Newtons
a) 8 N
b) 1 N
c) 10 N
d) 12 N
e) 17 N
The path of a projectile fired with some horizontal velocity
is shown as a dashed line (B) in the picture.
12. Which trajectory would best represent the same
projectile if Earth's surface gravity were to increase?
a) A
b) B c) C d) D e) unknown
D
A
B
C
13. Which trajectory would best represent the same
projectile if Earth's gravity was nonexistent?
a) A
b) B c) C d) D e) unknown
14. The slope of the relation pictured at right is:
a) v/t
b) a constant
c) the rate of change of velocity with time
d) acceleration
e) all of the above
Velocity (m/s)
Time (s)
15. The weight of an object is:
a) the quantity of matter it contains
b) the force with which it is attracted by gravity
c) identical to its inertia
d) the same quantity as its mass, except expressed in different units
e) independent of the object's position on the Earth
Dr. Bullock
PHSC 1013 Physical Science
TEST 2-A
16. What two measurements are needed to obtain average speed?
a) distance and temperature
b) velocity and acceleration
c) mass and distance
d) distance and time
e) time and mass
Match the following diagram elements with the appropriate force.
a)
b)
c)
d)
e)
Force on apple due to gravitational attraction of Earth
Force on Earth due to gravitational attraction of apple
Force applied by person
Frictional force between the apple and the surface of the table
Force exerted on the apple from the table
A race car with a mass of 1200 kg accelerates from rest to a velocity of 60 m/s in 10
seconds.
22. The final velocity of the race car was:
a) 60 m/s
b) 0 m/s
c) 30 m/s
d) 6 m/s
e) 3 m/s
23. The acceleration of the race car was:
a) 0 m/s2
b) 60 m/s
c) 6 m/s2
d) 30 m/s
e) 3 m/s2
24. If the time were doubled from 10 seconds to 20 seconds then the total distance the race car
traveled would:
a) double
b) remain constant c) triple
d) quadruple e) increase by a factor of 20
25. The force provided by the engine was:
a) 3600 J
b) 7200 J
c) 3600 N
d) 7200 N
e) 3600 N-m
Dr. Bullock
PHSC 1013 Physical Science
TEST 2-A
26. A person is standing on a spring-type bathroom scale in an elevator. When the elevator is at
rest, the spring scale reads a weight of 800 N. When the elevator starts to move, the scale
indicates a reading of 600 N. The elevator, therefore, has:
a) a constant downward speed
b) an upward acceleration
c) an acceleration of zero
d) a constant upward speed
e) a downward acceleration
27. If a boat sails 6 km west and then 8 km north in 2 hours, the total distance traveled is _____
and its average speed is _____.
a) 14 km, 14 km/hr
b) 10 km, 5 km/hr
c) 14 km, 7 km/hr
d) 7 km, 7 km/hr
e) 14 km, 4 km/hr
** True or False (A =True, B = False)
28. Aristotle’s physics governed science until about the mid 16th century
29. An object in equilibrium can not have any forces acting on it.
30. Objects that move in a straight line can never be accelerating.
31. When a rock is dropped off a building the Earth is accelerated up toward the rock
32. A vector involves a numerical value AND a specified direction.
33. Friction is a force that causes objects to gain additional mass.
34. According to the ancient Greeks, objects composed of ether move in gigantic, perfect
ellipses
35. If an object moves in a circular path at a constant speed the object has no acceleration
36. The object pictured would experience equilibrium.
Force = 1 N
Force = 4 N
Force = 1 N
Dr. Bullock
PHSC 1013 Physical Science
TEST 2-A
** Matching (match the term numbered at left with a definition lettered at right)
37. Equilibrium
a) For every action, there is an equal and opposite reaction.
38. Newton’s II Law of Motion b) The product of mass and acceleration
39. Inertia
c) The sum of all forces equals zero (i.e. Fnet = 0)
40. Newton's III Law of Motion
d) The tendency to resist motion
e) The product of mass and velocity
** Of the following quantities classify each as either a scalar (a) or a vector (b)
(a) – scalar
(b) – vector
41. 32 ft/s2
42. 9.8 m/s2, downward
43. 100 0C
44. 30 m/s East
45. 10 m
46. 95 lbs, East
47. 40 lbs/in inward
48. acceleration
49. speed
50. velocity
TEST 2-A
PHSC 1013 Physical Science
Dr. Bullock
** Multiple choice (choose the best answer)
51. Miss Pickles and I take a trip to New York City (1,350 miles) and we’re able to drive straight
through (because we’re drinking a lot of caffeine). The trip takes us 20 hr 45 minutes. Our
average speed is
a) 65 mph
b) 68 mph
c) 0.015 mph
d) 30 mph
e) 65 m/s
52. The ancient Greeks would describe motion that could maintain itself without the aid of an
outside agent as
a) inertia
b) eros
c) violent motion
d) gravity
e) natural motion
Speed (m/s)
53. Referring to the graph below which object has the greatest acceleration
850
a) A
800
b) B
750
c) C
700
object A
650
d) D
600
e) E
550
500
450
400
350
300
250
200
150
100
50
0
object B
object C
object D
object E
1
2
3
Time (sec)
4
5
Dr. Bullock
PHSC 1013 Physical Science
Distance (meters)
54. Referring to the graph below which object has the smallest acceleration
a) A
b) B
500
c) C
object A
object B
d) D
object C
400
object D
e) E
object E
TEST 2-A
300
200
100
0
5
10
15
20
Time (sec)
55. Using the Aristotelian Periodic Table place the four “earthly” elements in order from
lightest to heaviest
a) ether, fire, air, water
b) earth, water, air, fire
c) fire, air, earth, water
d) air, fire, water, earth
e) fire, air, water, earth
56. According the ancient Greeks motion that forces objects to behave contrary to their
natural motion is known as
a) inertia
b) eros
c) violent motion
d) gravity
e) unnatural motion
57. The ancient Greeks believed in a fifth element that was perfect an unchangeable, what is
the name of this element?
a) earth
b) fire
c) water
d) wind
e) ether
PHSC 1013 Physical Science
Dr. Bullock
58. The “Law of Inertia” was first proposed by
a) Galileo
b) Newton
c) Aristotle
d) Einstein
e) Brown
TEST 2-A
59. The “Law of Inertia” states
a) An object will not move unless acted upon by a force
b) An object will move in perfect circles unless acted upon by an external force
c) The more massive an object, the more inertia it has
d) An object will move in a straight line at constant speed unless acted upon by an
external force
e) An object will move in a straight line at constant acceleration unless acted upon by
an external force
60. Quantities that have only magnitude (or size) are known as
a) vectors
b) tensors
c) scalars
d) numbers
e) matrix
Use the following diagram to answer question 60-63 about an object that moves in a circle
with radius, r = 2 m and speed v = 4 m/s.
v
North
East
West
r
South
61. If the particle is traveling clockwise, which direction is the velocity vector pointing at the
object’s current position?
a) North
b) South
c) East
d) West
e) South –East
Dr. Bullock
PHSC 1013 Physical Science
TEST 2-A
62. If the particle is traveling clockwise, which direction is the acceleration vector pointing at
the object’s current position?
a) North
b) South
c) East
d) West
e) South –East
63. What is the magnitude of the objects acceleration?
a) 4 m/s2
b) 8 m/s2
c) 2 m/s2
d) 0.5 m/s2
e) 0.25 m/s2
64. If the velocity of the particle is reduced by half what happens to the object’s acceleration?
a) decreases by a factor of 4
b) decreases by a factor of 2
c) increases by a factor of 4
d) increases by a factor of 2
e) remains the same
65. The speed at which air resistance (drag) matches the Earth’s gravitational pull resulting in a
constant fall rate is known as
a) acceleration of gravity
b) acceleration of drag
c) drag velocity
d) gravitational velocity
e) terminal velocity
66. An object has a mass of 10 kg what is its weight on Earth?
a) 0.98 Newtons
b) 9.8 Newtons
c) 98 Newtons
d) 980 Newtons
e) 10 Newtons
67. On planet X an object of mass = 1 kg weighs 0.1 Newtons, what is the acceleration of gravity
on planet X?
a) 9.8 m/s2
b) 0.1 m/s2
c) 1 m/s2
d) 10 m/s2
e) 1.1 m/s2
Dr. Bullock
TEST 2-A
PHSC 1013 Physical Science
68. Suppose that you must hold an object against a wall, such that it will not slip down.
Which free-body diagram properly shows the forces acting on the object?
(a)
(e) none of these
(b)
(c)
(d)
69. On a trip to Little Rock (distance = 100 miles) I stop in Conway for 30 minutes. My total trip
time was 2 hours. What was my average speed for my trip to Little Rock?
a) 50 mph
b) 66.7 mph
c) 40 mph
d) 100 mph
e) 70 mph
70. Which test do you have?
a) A
b) B
c) C