Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which diagram best
represents the gravitational forces, Fg, between a satellite, S, and
Earth?
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2.
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A 25-newton horizontal force northward and a
35-newton horizontal force southward act concurrently on a 15-kilogram object on a frictionless
surface. What is the magnitude of the object’s acceleration?
a. | 4.0 m/s2 | c. | 2.3 m/s2 | b. | 1.7
m/s2 | d. | 0.67 m/s2
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3.
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A potential difference of 10.0 volts exists between
two points, A and B, within an electric field. What is the magnitude of charge that
requires 2.0 x 10–2 joule of work to move it from A to
B?
a. | 5.0 x 10–2 C | c. | 5.0 x 102 C | b. | 2.0 x
10–3 C | d. | 2.0 x 10–1
C |
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4.
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Two stones, A and B, are thrown
horizontally from the top of a cliff. Stone A has an initial speed of 15 meters per second and
stone B has an initial speed of 30 meters per second. Compared to the time it takes stone A
to reach the ground, the time it takes stone B to reach the ground is:
a. | half as great | c. | twice
as great | b. | the same | d. | four times as
great |
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5.
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The diagram below
represents two concurrent forces.
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6.
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The magnitude of the centripetal acceleration of a
body moving at a speed of 9 m/s in a circle of radius 3 m is:
a. | 4 m/s2 | c. | 8
m/s2 | b. | 3
m/s2 | d. | 27
m/s2 |
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7.
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The speed of an object undergoing constant
acceleration increases from 8.0 meters per second to 16.0 meters per second in 10 seconds. How far
does the object travel during the 10 seconds?
a. | 3.6 x 102 m | c. | 1.6 x 102 m | b. | 8.0 x
101 m | d. | 1.2 x 102
m |
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8.
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Approximately how much time does it take light to
travel from the Sun to Earth?
a. | 4.50 x 1019 s | c. | 1.28 x 100 s | b. | 2.00 x
10–3 s | d. | 5.00 x 102
s |
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9.
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A series circuit contains four resistors. The
equivalent resistance of the circuit is equal to:
a. | R/4 | c. | R1+R2+R3+R4 | b. | [R1+R2+R3+R4]/
4 | d. | 4R |
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10.
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An electric drill operating at 120 volts draws a
current of 3.00 amperes. What is the total amount of electrical energy used by the drill during 1.00
minute of operation?
a. | 2.40 x 103 J | c. | 4.00 x 101 J | b. | 3.60 x
102 J | d. | 2.16 x 104 J
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11.
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If light from the sun takes 5.5 hours to reach
Pluto (the planet not the dog!) how far is that planet from the sun?
a. | 4.6x105 km | c. | 1.5x104 km | b. | 5.9x109
km | d. | 9.9x107 km |
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12.
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A ball is thrown at an angle of 60o to
the horizontal with an initial velocity of 30 m/s. After 2.0 s it’s horizontal distance
is:
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13.
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Charge flowing at the rate of 2.50 x
1016 elementary charges per second is equivalent to a current of:
a. | 4.00 x 10–3 A | c. | 2.50 x 10–3 A | b. | 2.50 x 1013 A | d. | 6.25 x
105 A |
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14.
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A bullet fired horizontally takes 4.0 s to reach
the ground. The height of the gun that fired is:
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15.
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Which graph best represents the relationship
between the magnitude of the centripetal acceleration and the speed of an object moving in a circle
of constant radius?
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16.
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A 1750 kilogram car travels at a constant speed of
15.0 meters per second around a horizontal, circular track with a radius of 45.0 meters. The
magnitude of the centripetal force acting on the car is:
a. | 583 N | c. | 8750
N | b. | 3.94 x 105 N | d. | 5.00 N
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17.
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The mass of a 1 gram paper clip is:
a. | 1 x 10-6 kg | c. | 1 x 10-3 kg | b. | 1 x 106
kg | d. | 1 x 103 kg |
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18.
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What is another form of units for N
a. | kg·m2/s2 | c. | kg·m2/s | b. | kg·s2/m2 | d. | kg·m/s2 |
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19.
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A circuit consists of a resistor and a battery.
Increasing the voltage of the battery while keeping the temperature of the circuit constant would
result in an increase in:
a. | resistance, only | c. | current, only | b. | both current and
resistance | d. | neither current nor resistance |
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20.
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As a car goes around a circular track, its speed
remains the same. The car’s acceleration is:
a. | Constant in direction but variable in
magnitude. | c. | Zero | b. | Constant in magnitude and direction. | d. | Constant in
magnitude but variable in direction. |
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21.
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Which combination of fundamental units can be used
to express energy?
a. | kg·m/s | c. | kg·m2/s | b. | kg·m2/s2 | d. | kg·m/s2 |
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22.
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As a meteor moves from a distance of 16 Earth radii
to a distance of 2 Earth radii from the center of Earth, the magnitude of the gravitational force
between the meteor and Earth becomes:
a. | 1/8 as great | c. | 8
times as great | b. | 64 times as
great | d. | 4 times as great |
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23.
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A projectile launched at an angle of 45° above
the horizontal travels through the air. Compared to the projectile’s theoretical path
with no air friction, the actual trajectory of the projectile with air friction is:
a. | higher and longer | c. | higher
and shorter | b. | lower and shorter
| d. | lower and longer |
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24.
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If the charge on each of two small spheres is
doubled, the force between them will:
a. | Increase by two times | c. | Increase by sixteen times | b. | Decrease by four times | d. | Increase by four
times |
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25.
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A bullet fired horizontally takes 4.0 s to reach
the ground. The height of the gun that fired is:
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26.
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A 10.0-Ù resistor,
20.0- Ù resistor, and 25.0- Ù
resistor are connected in series across a 110-V supply. Calculate the current in the
circuit.
a. | 2.0 amps | c. | 4.5
amps | b. | 55 amps | d. | 11
amps |
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27.
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Which fundamental force is primarily responsible
for the attraction between protons and electrons?
a. | electromagnetic | c. | strong | b. | weak | d. | gravitational |
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28.
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The attractive force that exists between all
objects is known as __________.
a. | Torque | c. | Gravitational force | b. | Centripetal
force | d. | The normal force |
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29.
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A rock falls from rest a vertical distance of 0.72
meter to the surface of a planet in 0.63 second. The magnitude of the acceleration due to gravity on
the planet is:
a. | 2.3 m/s2 | c. | 3.6 m/s2 | b. | 9.8
m/s2 | d. | 1.1
m/s2 |
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30.
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Three resistors, 4 ohms, 6 ohms, and 8 ohms, are
connected in parallel in an electric circuit. The equivalent resistance of the circuit
is:
a. | less than 4 Ù | c. | between 4 Ù and 8 Ù | b. | 18 Ù | d. | between 10 Ù and 18 Ù |
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