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TRACY UNIFIED SCHOOL DISTRICT
IB PHYSICS END OF COURSE EXAM 2005
REFERENCE MATERIAL
CONSTANTS
acceleration due to gravity
gravitational constant
rest mass of electron
rest mass of proton
elementary electronic charge
Coulomb’s constant
speed of sound in air (20ºC)
speed of light in vacuum
g
G
me
mp
e
k
vs
c
= 10 m/s2
= 6.7×10-11 N•m2/kg2
= 9.1×10-31 kg
= 1.7×10-27 kg
= 1.6×10-19 C
= 9.0×109 N•m2/C2
= 340 m/s
= 3.0×108 m/s
FORMULAS
x = vit + ½at2
vf = vi + at
vav = x/t
vf2 = vi2 + 2ax
aav = v/t
F = ma
vxi = vicos
vyi = visin
ac = v2/r
Fg = mg
Fg = Gm1m2/r2
p = mv
W = Fxcos
K = ½mv2
Ug = mgh
Us = ½kx2
P = W/t = Fv
V=IR
Fe = kq1q2/r2
E = F/q
V = W/q
P = VI
F = qvB
F = ILB
E = mc2
Quantities in bold type are vectors.
PHYSICS END OF COURSE EXAM 2005
A
Choose the one best answer for each question. Put all answers on the Answer Sheet.
Questions 1, 2, and 3 refer to the figure shown on the
right, which represents the displacement of a particle as
a function of time. The particle moves in a straight line.
1. What is the average velocity of the particle during
the time interval 0 to 5 seconds?
A. +65 m/s
B. +55 m/s
C. +13 m/s
D. +11 m/s
E. +2.0 m/s
2. What is the instantaneous velocity of the particle at
time 5 seconds?
A. - 5.0 m/s
B. - 2.0 m/s
C. 0
D. + 2.0 m/s
3. What is the instantaneous acceleration of the particle at time 5 seconds?
A. - 2.5 m/s2
B. - 1.0 m/s2
C. 0
D. + 1.0 m/s2
E. + 5.0 m/s
E. +2.5 m/s2
4. A student picks up a rock from the surface of the Earth and tosses it straight up. While the rock is
still rising, its velocity
A. and acceleration are both downward.
B. is upward but its acceleration is downward.
C. is downward but its acceleration is upward.
D. and acceleration are both upward.
E. and acceleration are both constant.
5. In the equation d = v0t + 1/2at2 for the displacement of a uniformly accelerating object, the term
“v0t” represents
A. the initial velocity.
D. the initial acceleration.
B. the velocity after t seconds.
E. the acceleration after t seconds.
C. the distance traveled if the acceleration is zero.
6. A 15-kg object and a 3-kg object of the same size and shape are dropped simultaneously. Air
resistance is negligible. Which of the following statements is true?
A. Both objects always have identical gravitational force acting on them.
B. Both objects always have identical acceleration.
C. Both objects always have identical momentum.
D. Both objects always have identical kinetic energy.
E. Both objects always have identical density.
7. The coefficient of friction between the rubber soles of a student’s shoes and a wooden floor is
0.600. What is the horizontal force required to push a standing 60.0 kilogram student across this
floor at constant speed?
A. 10.0 N
B. 36.0 N
C. 100 N
D. 360 N
E. 1000 N
8. A projectile is shot with an initial velocity of 10 m/s at an angle of 53° above the horizon. Assume
air resistance is negligible. Which of the following characteristics of the motion changes while the
projectile is moving?
I. Horizontal component of velocity
II. Vertical component of velocity
III. Acceleration
A. I only
B. II only
C. III only
D. II and III only
E. I and III only
9. A bullet that is shot horizontally from a gun
A. strikes the ground much later than one dropped from the same height at the same instant.
B. is brought to rest by air resistance alone.
C. strikes the ground at approximately the same time as one dropped from the same height at the
same instant.
D. travels in a straight line.
E. strikes the ground much sooner than one dropped from the same height at the same instant.
10. Two objects are accelerated across a frictionless
horizontal surface as shown at the right. What would
be the force exerted by rope A?
A. 6.0 N
C. 30 N
E. 60 N
B. 90 N
D. 120 N
11. A lead block is suspended by a string that is held by your hand. The reaction to the force of the
Earth on the block is the force exerted by the
A. block on the Earth
D. block on the string
B. hand on the string
E. string on the block
C. string on your hand
12. A toy car is pulled across a horizontal surface. The net force acting on the car is constantly
increasing in magnitude. Which of the following statements best describes the motion of the car?
A. The velocity of the car is decreasing at a constant rate.
B. The velocity of the car is increasing at a constant rate.
C. The acceleration of the car is decreasing.
D. The acceleration of the car is increasing.
E. The acceleration of the car is constant.
13. A particle moves in a circular path of radius 0.10 m with a constant frequency of 5.0 rev/s. The
acceleration of the particle is
A. 0.10 m/s2
B. 0.50 m/s2
C. 10 m/s2
D. 50 m/s2
E. 100 m/s2
14. The mass of an elevator and its occupants is 800 kg. The tension on the cable pulling the elevator
is 8800 N. The acceleration of the elevator is approximately
A. 1.0 m/s2 up
B. 0.50 m.s2 up
C. 0
D. 0.50 m/s2 down E. 1.0 m/s2 down
15. A 5.0-kg object is moved 10 m along a horizontal surface by a force of 30 N acting in the direction
of the object’s velocity. The surface exerts a constant frictional force of 12 N. During this motion,
the object’ s kinetic energy changes by
A. 120 J
B. 180 J
C. 300 J
D. 420 J
E. 500 J
16. A group of students are traveling in a van to deliver a fish tank to a friend. They observe that the
surface of the water is not parallel to the floor of the van. Which of the following explanations could
NOT, by itself, account for their observations?
A. The van is going up a hill.
B. The wheels on the front of the van have a diameter different from those on the rear.
C. The van is undergoing constant acceleration.
D. The van is going around a curve.
E. The van is moving at a constant velocity.
17. A person lifts a 50-N object 0.50 m, carries it at constant speed 50 m along a level path, and
carefully lowers it 0.50 m to the ground again. The net amount of work done on the object is
A. 0 J
B. 25 J
C. 50 J
D. 2500 J
E. 2550 J
18. An object of mass 5.00 kg is raised vertically 10.0 m in 20.0 s. What is the increase in the potential
energy of the object?
A. 5.00 J
B. 50.0 J
C. 500 J
D. 1.00xl03 J
E. 2.00xl04 J
19. A 0.00300-kg bullet traveling horizontally at 400 m/s hits a 3.00-kg wooden block that is initially at
rest on a smooth horizontal table. The bullet buries itself in the block without passing through. The
speed of the block after the collision is most nearly
A. 0.0133 m/s
B. 0.400 m/s
C. 12.7 m/s
D. 40.0 m/s
E. 160 m/s
20. A ball with mass 4M and speed V hits
a smaller ball of mass M that was
originally at rest After the collision the
smaller ball moves with a speed 4v
and the larger ball is at rest. Which of
the following statements best
describes the collision?
A. Neither momentum nor kinetic energy is conserved.
B. Kinetic energy is conserved but momentum is gained.
C. Momentum is conserved but kinetic energy is lost.
D. Momentum is conserved but kinetic energy is gained.
E. Both momentum and kinetic energy are conserved.
21. A stationary 0.100-kg firecracker explodes into three pieces. After the explosion, a 0.025-kg piece
is found to be moving east at 10 m/s. A 0.050-kg piece is moving west at 4.0 m/s. The velocity of
the third piece is
A. 50 m/s east
B. 25 m/s west
C. 25 m/s east
D. 2.0 m/s east
E. 2.0 m/s west
22. Assume that the Earth suddenly shrank to one-half its original diameter, but its mass remained
unchanged. The weight of a person standing on its surface would be
A. four times the original weight.
C. twice the original weight.
B. the same as the original weight.
D. one-half the original weight.
23. The orbital speed of a satellite in circular orbit around a planet is independent of the
A. period of the satellite.
D. orbital radius of the satellite.
B. mass of the satellite.
E. mass of the planet.
C. frequency of the satellite.
24. A runner’s velocity is doubled. The runner’s momentum will be:
A. quadrupled
B. doubled
C. the same
D. halved
E. quartered
25. Acceleration is the time rate at which ______ changes.
A. displacement
B. force
C. mass
E. velocity
D. position
26. Which graph of position x versus time t best represents a moving object with positive velocity and
positive acceleration, both in the x direction?
27. A ball is thrown vertically upward. At its highest point, its velocity is _____ and its acceleration is
__________
A. up, zero
B. zero, zero
C. zero, down
D. down, zero
E. down, down
28. A pendulum oscillates between points P and R, the points of maximum
displacement. Point Q is its equilibrium position. If it takes 1.0 s to move from
point Q to R, what is the period of the oscillation?
A. 0.25 s
C. 1.0 s
E. 4.0 s
B. 0.50 s
D. 2.0 s
29. Two forces (see figure at right) act on a 1.5 kg block. What is the
magnitude of the acceleration of the block?
A. 4.0 m/s2
C. 9.3 m/s2
E. 21 m/s2
2
2
B. 9.0 m/s
D. 10 m/s
30. Which graph of position x versus time t best represents a moving object with constant velocity in
the x direction?
31. An automobile’s velocity is doubled. The automobile’s kinetic energy will be:
A.quadrupled.
B. doubled.
C. the same.
D. halved.
E. quartered.
32. A ball is thrown upward (ignore air resistance). What force(s) act on the ball as it travels upward
after leaving the throwers hand?
A. A constant upward force.
B. A decreasing upward force.
C. The downward gravitational force.
D. A constant upward force and the downward gravitational force.
E. A decreasing upward force and the downward gravitational force.
33. A mass at rest explodes, breaking into two pieces of unequal mass that move in opposite
directions. Which of the following is correct?
A. Both pieces have the same speed.
B. The more massive piece has the greater speed.
C. The momentum of the more massive piece has the greater magnitude.
D. Both pieces have the same magnitude of momentum.
E. The momentum of the less massive piece has the greater magnitude.
34. If the Earth had its present radius but twice as much mass, you would weigh _____ what you
weigh now.
A. one fourth
B. one half
C. the same as
D. twice
E. four times
35. An object with mass m is dropped from height h and attains a speed v at
ground level. A second object with mass 2m is dropped from height 2h.
Ignoring air resistance, the speed attained by the second object at ground
level is:
A. 0.5v
B. v
C. √2v
D. 2v
E. 4v
36. A track star accelerates from rest and reaches a speed of 3.0 m/s in 4.0 s. The magnitude of his
average acceleration is:
A. 0.38 m/s2
B. 0.75 m/s2
C. 1.3 m/s2
D. 12 m/s2
E. 24 m/s2
37. A book rests on a horizontal table. The Newton’s Third Law reaction force to the force that the
table exerts on the book is:
A. the gravitational force that Earth exerts on the book.
B. the gravitational force that the book exerts on Earth.
C. the frictional force of the table on the book.
D. the force that the table exerts on the book.
E. the force that the book exerts on the table.
38. In the absence of air resistance, the horizontal component of the velocity of a projectile:
A. decreases with distance.
D. decreases with time.
B. increases with time.
E. is zero.
C. remains constant.
39. A physics instructor is standing on a scale in a moving elevator. Which of the following motions of
the elevator would cause the reading to increase?
A. increasing its downward speed
D. moving downward with constant speed
B. moving upward with constant speed
E. slowing to a stop while moving downward
C. slowing to a stop while moving upward
40. Which statement best describes motion in the solar system?
A. The Earth makes one revolution around the sun each day.
B. The Earth makes one revolution around the sun each year.
C. The moon makes one revolution around the Earth each day.
D. The sun makes one revolution around the Earth each day.
E. The sun makes one revolution around the Earth each year.
41. An object from Earth is transported to the moon. On the moon the object’s:
A. weight and mass are less than on Earth.
B. weight and mass are the same as on Earth.
C. weight and mass are more than on Earth.
D. weight is less but mass is more than on Earth.
E. weight is less but mass is the same as on Earth.
42. A ball is dropped from rest at point 3 onto a massless
coil spring with spring constant k. The spring
compresses to point 1, where the ball is momentarily at
rest again. Which equation best expresses the total
energy of the system at point 3? Assume all variables
are non-zero.
A. mgy3
D. mgy3 + ½mv2
B. mgy3 + ½ky12 E. mgy3 + ½ k(y2 – y1)2
C. mgy3 + ½mv2 + ½ky12
43. For the ball and spring in the previous question #45, which equation best expresses the total
energy of the system when the ball is at point 1?
A. mgy1
D. mgy1 + ½mv2
B. mgy1 + ½ky12 E. mgy1 + ½ k(y2 – y1)2
C. mgy1 + ½mv2 + ½ky12
44. An object moving with constant speed in a circular path has a net force acting on it directed:
A. inward toward the center of the circle.
E. No net force acts on it.
B. outward away from the center of the circle.
C. tangent to the circle in the direction of the velocity.
D. tangent to the circle in the direction opposite to the velocity.
45. The particles propagating a mechanical wave oscillate parallel to the wave velocity. The wave is
A.circular.
B. longitudinal.
C. perpendicular D. polarized.
E. transverse.
46. What is the wavelength of a wave created by a 10 Hz source if the wave travels at 10 m/s?
A. 10 mm
B. 0.10 m
C. 1.0 m
D. 10 m
E. 0.10 km
47. A wave has a frequency of 50 Hz. The period of the wave is:
A. 0.02 s
B. 0.2 s
C. 1 s
D. 20 s
48. Consider radio waves (R), ultraviolet light (UV), infrared light (IR), and gamma rays (). From
lowest to highest frequency these would be ordered:
A.,UV,IR,R
B. IR,R,UV,
C. UV,R,IR,
D. R,UV,,IR
E. R,IR,UV,
49. When the crest of one wave meets the crest of another wave, the waves:
A. constructively interfere with maximum amplitude.
B. constructively interfere with zero amplitude.
C. destructively interfere with maximum amplitude.
D. destructively interfere with zero amplitude.
E. will not interfere.
50. A driver in a car first approaches, then passes a stationary train. How does the pitch of the
stationary train whistle sound to the moving driver?
A. The same as when the driver is also at rest.
B. First higher, then lower than when the driver is also at rest.
C. First lower, then higher than when the driver is also at rest.
D. Slightly higher, then much higher than when the driver is also at rest.
E. Slightly lower, then much lower than when the driver is also at rest.
51. Maximum destructive interference occurs when the phase difference between two waves is:
A. 0°
B. 90°
C. 180°
D. 270°
E. 360°
52. A tube open at both ends resonates at the fundamental frequency when the wavelength of the
sound is nearly _____ the length of the tube.
A. ¼
B. ½
C. equal to
D. twice
E. four times
53. The distance between two adjacent crests of a periodic wave is the:
A. amplitude
B. frequency
C. period
D. speed
E. wavelength
54. In a vacuum all electromagnetic waves have the same:
A. amplitude
B. frequency
C. period
E. wavelength
D. speed
55. On which of the following conditions does the speed of light depend?
A. The material through which light travels
B. The brightness of the light source
C. The distance the light has traveled from the source
D. The source of the light: sun, candle, light bulb, etc
E. None of the above, the speed of light is always a constant
56. A fire truck proceeding to a fire, approaches and passes a stationary observer. How does the pitch
of the moving siren sound to the observer?
A. The same as when the truck is at rest.
B. Slightly higher, then much higher than that of the truck at rest.
C. Slightly lower, then much lower than that of the truck at rest.
D. First higher, then lower than when the truck is at rest.
E. First lower, then higher than when the truck is at rest.
57. The inverse of the period is the:
A. amplitude
B. frequency
58. At the point where the crest of one wave meets the trough of another wave with the same
amplitude and frequency, the waves:
A. constructively interfere with maximum amplitude.
B. constructively interfere with zero amplitude.
C. destructively interfere with zero amplitude.
D. destructively interfere with maximum amplitude.
E. will not interfere.
59. Sound waves in a gas are always ____ waves.
A. longitudinal
B. transverse
C. resonant
D. standing
E. polarized
60. On a day when the speed of sound is 350 m/s, a clarinet sounds a note of frequency 275 Hz. The
wavelength is about:
A. 0.65 m
B. 0.79 m
C. 1.0 m
D. 1.3 m
E. 10 m
61. A guitar string has fundamental frequency f. If you press your finger down on the middle of the
string, the new fundamental frequency will be:
A. ¼f
B. ½f
C. f
D. 2f
E. 4f
62. In a vacuum green light always differs from red light in:
A. amplitude.
B. intensity.
C. polarization.
D. speed.
E. frequency.
63. An electric force F exists between two point charges. If both the charges are doubled AND the
distance between them is doubled, the electric force between the charges becomes
A. F/4
B. F/2
C. F
D. 2F
E. 4F
64. An object with a uniform negative charge distribution attracts a second object. Which of the
following statements COULD be true?
I. The second object is a insulator with positive net charge.
II. The second object is a conductor with zero net charge.
III. The second object is an insulator with zero net charge.
A. I only
B. II only
C. III only
D. II and III only
E. I, II, and III
65. A light bulb manufactured in the USA is labeled 100 watts. Assume the voltage is 120 V. What is
the approximate resistance of the light bulb in ohms?
A. 0.833 
B. 1.20 
C. 100 
D. 144 
E. 10,000 
66. The time rate at which electrical energy is delivered to a circuit is known as
A. capacitance
B. current
C. field
D. power
E. resistance
Questions 75, 76, and 77 all refer to the circuit diagrammed to the
right. All four resistors, labeled “1”, “2”, “3”, and “4”, have equal
resistance.
67. Which resistor has the greatest current flowing through it?
A. 1
C. 3
E. All have the same
B. 2
D. 4
current
68. The voltage across resistor “2” is _____ the voltage across resistor “4”.
A. one-third
B. one-half
C. the same as
D. twice
E. three times
69. Resistor “2” is removed and a gap is left in its place. The current through resistor “4” would
A. become zero
.
C. be unchanged
E. become infinite
B. decrease but not become zero
D. increase but stay finite
70. The strength of the magnetic field at a point near a long current carrying wire _____ as the current
increases and _____ as the distance from the wire increases.
A. increases, increases
C. increases, decreases
E. decreases, decreases
B. increases, is unchanged
D. decreases, increases
71. The device which converts mechanical energy into electrical energy is the
A.generator
B.galvanometer
C. motor
D. voltmeter
72. A neutral atom could be composed of:
A. 4 electrons, 5 protons, 6 neutrons
B. 5 electrons, 5 protons, 6 neutrons
C. 6 electrons, 5 protons, 6 neutrons
E. resistor
D. 0 electrons, 5 protons, 5 neutrons
E. 5 electrons, 6 protons, 5 neutrons
73. An electric force F exists between two point charges. If both
charges are doubled, the electric force between the two charges is:
A. ¼F
B. ½F
C. F
D. 2F
E. 4F
74. Two identical resistors connected in series have a combined resistance of 8.0 ohms. When
connected in parallel, the resistance of the combination will be:
A. 2.0 ohms
B. 4.0 ohms
C. 8.0 ohms
D. 16 ohms
E. 32 ohms
75. Electromagnetic radiation is made up of
A. Perpendicular transverse electric and magnetic fields.
B. Parallel transverse electric and magnetic fields.
C. Waves that travel at 345 m/s in air.
D. Waves that require a medium for transmission.
E. Longitudinal electric and magnetic fields.
76. One positive and two negative charges are placed at the corners of an
equilateral triangle as shown to the right. All charges have the same
magnitude. The direction of the net electric force on the negative charge at
the top due to the other charges is:
A. undefined, since the force is zero
C. to the left
E. towards the top of the page
B. towards the bottom of the page
D. to the right
77. Two light bulbs in parallel will always have the same:
A. brightness
B. current in them C. power
D. resistance
E. voltage across them
78. Object 1 has an initial charge of + 6.0 C. Object 2 is initially uncharged. They are brought into
contact and then separated. After separation, object 1 has a charge of +2.0 C. The charge on
object 2 is:
A. +6.0 C
B. +4.0 C
C. +2.0 C
D. 0
E. -2.0 C
79. A circuit has a total resistance of 12 ohms and uses a 9.0 volt battery. The circuit draws a current
of ______ amperes.
A. 0.75
B. 1.3
C. 6.8
D. 16
E. 108
80. Coulomb’ s Law is the expression for the:
A. electric force between two point charges.
B. magnetic force between two moving point charges.
C. power delivered to a circuit.
D. strength of the electric current.
E. relation between voltage, resistance, and current in a circuit.
81. Magnet I is twice as strong as magnet II and at a certain distance pulls on magnet II with a force of
magnitude 4.0 N. The magnitude of the force on magnet I is:
A. 1.0 N
B. 2.0 N
C. 4.0 N
D. 8.0 N
E. 16 N