IB Diploma Physics
9.
Topic 3: Thermal Physics
This question is about temperature and internal energy.
Two solid copper spheres, having different radii, undergo the same temperature change. A
student states that the change in internal energy of the two ob

IB Physics: Question Book Simple harmonic
motion
Name:
Physics class:
1.
For a system executing simple harmonic motion, the restoring force acting on the system is
1
proportional to the
A.
displacement of the system from equilibrium.
B.
amplitude of oscil

IB Physics: Question Book
Topic 1: Measurement and uncertainties.
Name:
Physics class:
1
1.1
1.
The order of magnitude of the weight of an apple is
A.
4
10 N.
B.
2
10 N.
C.
1 N.
D.
2
10 N.
(1)
2.
Which of the following gives the approximate ratio of the s

IB Diploma| Physics
34.
Practice Questions
H1-4 Special Relativity
This question is about simultaneity.
Two people, X and Y, are facing each other at opposite ends of a railway carriage. Person A is
also in the carriage, midway between them. The carriage

IB Diploma| Physics
25.
Practice Questions
H1-4 Special Relativity
This question is about relative velocities.
(a)
Describe what is meant by a Galilean transformation.
.
.
(1)
(b)
Two electrons travel along the same straight line towards each other. The s

IB Diploma| Physics
Practice Questions
H1-4 Special Relativity
Mark Scheme:
10.
(a)
(b)
rest mass energy is the energy that is needed to create the particle at rest /
2
reference to E0 = m0c ;
total energy is the addition of the rest energy and everything

IB Diploma Physics
Practice questions
Name:_
1.
Topic 13.2: Nuclear Physics
The following are statements concerning radioactive decay.
I.
Alpha particles have discrete energies.
II.
The beta-energy spectrum is a broad continuous distribution of energies.

1.
Sound of a constant frequency f0 is being emitted by a sound source. An observer O travels in
the direction shown at a speed of 0.1 v where v is the speed of sound.
o b se rv er
O
so u n d so u rce
Which of the following gives the relationship between

1.
(a)
(i)
hc
energy = / energy = hf and c = f;
(6.63 10 34 3.0 10 8 )
(6.0 10 7 )
=
Award [0] for = 3.3 10
(ii)
(i)
(ii)
(c)
(i)
(ii)
J
h
momentum = ;
(6.63 10 34 )
7
= (6.0 10 )
2
Award [0] for = 1.1 10
(b)
19
2
27
kg m s
1
(N s).
5.0
19
19 1
number =

1.
This question is about nuclear reactions.
(a)
(i)
Distinguish between fission and radioactive decay.
.
.
.
.
.
(4)
235
U
A nucleus of uranium-235 ( 92 ) may absorb a neutron and then undergo fission to produce
90
142
Sr
Xe
nuclei of strontium-90 ( 38 )

1.
7
Light of wavelength 6.0 10 m is incident normally on a plane surface as shown below.
In c id e n t lig h t, w a v e le n g th 6 .0 1 0
7
m
S u rfa c e
The light photons are absorbed by the surface.
(a)
Show that, for one photon of the light,
(i)
its

1.
(a)
(i)
fission:
nucleus splits;
into two parts of similar mass;
radioactive decay:
nucleus emits;
a particle of small mass and / or a photon;
(ii)
235
1
92 U 0 n
90
38 Sr
4
;
142
54 Xe
4 01 n ;
2
Allow ecf for RHS if LHS is incorrect.
(iii)
(b)
(i)
m

1.
D
[1]
2.
B+C
[1]
3.
D
[1]
4.
B
[1]
5.
B
[1]
6.
C
[1]
7.
B
[1]
8.
A
[1]
9.
B
[1]
10.
B
[1]
11.
C
[1]
12.
A
[1]
13.
C
[1]
14.
B
[1]
1
15.
D
[1]
16.
D
[1]
17.
C
[1]
18.
C
[1]
19.
B
[1]
20.
B
[1]
21.
A
[1]
22.
D
[1]
23.
B
[1]
24.
C
[1]
25.
C
[1]
26.
B
[1]

1.
B
[1]
2.
D
[1]
3.
A
[1]
4.
C
[1]
5.
C
[1]
6.
A
[1]
7.
B
[1]
8.
D
[1]
9.
B
[1]
10.
A
[1]
11.
D
[1]
12.
B
[1]
13.
A
[1]
14.
B
[1]
1
15.
D
[1]
16.
C
[1]
17.
D
[1]
18.
B
[1]
19.
B
[1]
20.
C
[1]
21.
B
[1]
22.
C
[1]
23.
B
[1]
24.
A
[1]
25.
A
[1]
26.
D
[1]
27

IB Physics: Question Book
Waves and wave behaviour.
Name:
Physics class:
1
1.
(1)
2.
(1)
3.
(1)
2
4.
A wave pulse is travelling to the right along a string.
Which of the following best represents the direction of the velocity of the point P?
A.
B.
C.
D.
(

IB Diploma| Physics
16.
Practice Questions
H1-4 Special Relativity
This question is about Special Relativity.
(a)
Explain what is meant by an inertial frame of reference.
.
.
(1)
(b)
State the two postulates of the Special Theory of Relativity.
1.
.
.
2.

1.
(a)
(i)
(ii)
Diagram 1: a straight line path (with or without showing the
spaceship as having moved);
1 max
Diagram 2: a path clearly curving towards the base;
1 max
Diagram 1: View with respect to the
inertial observer
Diagram 2: View with respect to

Collisions
A large metal ball is hung from a crane by means of a cable of length 5.8 m as shown below.
In order to knock down a wall, the metal ball of mass 350 kg is pulled away from the wall and
then released. The crane does not move. The graph below sh

3.
(b)
they are vectors because they have magnitude and direction;
1
Answer needs some form of explanation to receive the mark but it can
be simple.
(c)
appropriate reference / naming of Newton III;
to give forces equal and opposite;
time of collision the

4.
Kinematics
(a)
State the principle of conservation of energy.
.
.
(1)
(b)
An aircraft accelerates from rest along a horizontal straight runway and then takes-off.
Discuss how the principle of conservation of energy applies to the energy changes that
ta

5.
This question is about power output of an outboard motor.
A small boat is powered by an outboard motor of variable power P. The graph below shows the
variation with speed v of P when the boat is carrying different loads.
5 .0
4 .5
350 kg
4 .0
3 .5
3 .0

5.
(a)
(b)
(i)
2.0 kW; ( 0.10 kW)
1
(ii)
P
F= v ;
= 1000 N = ; ( 50 N)
2
(i)
4 .0
3 .5
3 .0
2 .5
P / kW
2 .0
1 .5
1 .0
0 .5
0 .0
200
250
300
350
400
W / kg
sensible use of grid and suitable P scale; (at least half of grid used)
labelled P axis with correc

6.
Collisions
(a)
(i)
centripetal force is provided by the cable / the ball is moving along
the arc of a circle;
1
350 2.6 ;
2
(ii)
centripetal force =
5 .8
= 410N;
tension = 410 + (350 9.8) = 3800N;
3
v2
Award [0] if r is not used.
(b)
idea of use of are

4.
Kinematics
(a)
appropriate statement of principle of conservation of energy;
1
eg Energy can not be created or destroyed, it just changes form.
(b)
knowledge that the aircraft starts with chemical energy (in the fuel) and
ends with kinetic energy;
real

IB Diploma| Physics
13.
Practice Questions
H1-4 Special Relativity
This question is about frames of reference.
(a)
Explain what is meant by a reference frame.
.
.
.
.
(2)
In the diagram below, Jasper regards his reference frame to be at rest and Morgans r

1.
(a)
proper time:
the time interval measured by an observer of an event
that happens at the same place according to that observer;
proper length: the length of an object as measured by an observer who
is at rest relative to the object;
2
Do not look for

IB Diploma| Physics
Practice Questions
H7-8 General Relativity
Name:_
1.
Class:_
This question is about the equivalence principle.
(a)
In a famous thought experiment relating to general relativity, Einstein considered a
spaceship in a gravity-free region

IB Diploma| Physics
1.
Practice paper
13.1 Quantum Physics
When light is incident on a metal surface, electrons may be ejected. The following graph shows
the variation with frequency f of the maximum kinetic energy Ek max of the ejected electrons.
Ek m ax

IB Diploma| Physics
1.
Practice questions
11.1 Standing waves
Standing waves in an open pipe come about as a result of
A.
reflection and superposition.
B.
reflection and diffraction.
C.
superposition and diffraction.
D.
reflection and refraction.
(1)
2.
A