Solutions
1.
George is correct. The law of conservation of momentum states that the total momentum
of the system remains constant. Since momentum is a vector quantity, however, it is
possible for one object to have a larger momentum than the total. The ot
Solutions
1.
1.1
Assume clock is mounted vertically so that both hands are vertical at midnight.
(a) Each hr on a clock represents 30; each min represents 360 = 6.
60
between hour & minute hands at 12:30 is 165.
12
9
r = 2.74 + 4.27 2(2.74)(4.27)cos165
Solutions
1.
Fy = may = 0
y
n = w = mgcos
n j + w( j ) = 0
n
Fx = max
fk
w
fk( i ) + w|( i ) = max( i )
w|
x
w
kn + mgsin = max
kmgcos + mgsin = max
ax = g(sin kcos)
2.
w = mg sin30
w = mg cos30
w
2.1
y
n
UP:
f
w
9.80(sin30 + 0.3cos30) = a0
a0 = 7
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 3
31 March 2017
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a r
Solutions
1.
2.
Assuming aerodynamic lift, F, acts perpendicular to the wings
Fz maz 0
F
z
Fcos40
r
Fsin40
Fcos40 z + mg( z ) = 0
mg
F
cos 40
mg
40
mvt 2
Fr mar
r
2
F sin 40 mv
r
2
mg
sin 40 mv
r
cos 40
3.6 = 2 162 m i.e. 2.2 km
v2
r
g tan 40 g ta
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 2
24 March 2017
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a r
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 7
26 April 2017
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a r
Solutions
1.
Model:
Use the particle model for the wedge and the block.
Visualize:
The block will not slip relative to the wedge if they both have the same horizontal
acceleration a. Note: n1 on 2 n2 on 1.
Solve:
The y-component of Newtons second law for
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 6
21 April 2017
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a r
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 11
6 May 2016
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a rea
PHY1012F LAB TEST START TIMES
WED 11th MAY to WED 18th MAY 2016
Day
START
TIME
Wednesday
11-May
Thursday
12-May
Friday
13-May
Monday
16-May
Wednesday
18-May
PHY1012F
Groups
1 & 2
PHY1031F
PHY1031F
PHY1031F
PHY1031F
50
64
67
PHY1012F
Groups
3 & 4
PHY1012F
3 May 2016
PHY1012F, PHY1014F & PHY1031F
LABORATORY TEST MAY 2016
QUESTION 1
[40 Marks]
An irregular wooden lamina will be used (as a complex pendulum) in an experiment to determine the
gravitational acceleration, g u(g), as well as the moment of inertia,
DEPARTMENT OF PHYSICS
UNIVERSITY OF CAPE TOWN
PHY1031F 2017
Weekly Problem Set 9
(due 10h00 on Wednesday 07 June 2017)
1. The earths radius is about 4000 miles. Kampala, the capital of Uganda, and Singapore are
both nearly on the equator. The distance bet
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 13
19 May 2016
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Consult data tables in Knight Chapter 17 (Specific heats, Thermal conduct
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 12
13 May 2016
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a re
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 9
22 April 2016
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a r
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 10
29 April 2016
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a
DEPARTMENT OF PHYSICS
PHY1012F
UNIVERSITY OF CAPE TOWN
Weekly Problem Set 11
6 May 2015
Discuss problem solving strategies in groups of three, using notes, textbook and tutor help.
Declare on Vula (under Tests & Quizzes) whether or not you have made a rea
University of Cape Town
Department of Physics
PHY2010S
Friday 14th August 2015
Hand in: Friday 21st August 2015
Problem Set: 04
1) Determine the energy stored in a uniformly charged sphere of radius R and total charge Q
a) Using U
0
2
2
E d
Solution: We
University of Cape Town
Department of Physics
PHY2010S
Tuesday 28th July and Thursday 30th July 2015
Tutorial: 01
Work in groups of three or four.
Your work must be checked by a tutor after completing each question before you continue to the
next question
University of Cape Town
Department of Physics
PHY2010S
Friday 21st August 2015
Hand in: Friday 28th August 2015
Problem Set: 05
1) Suppose that the x y plane is a grounded conductor, and an infinite uniform line charge is placed
parallel to the x axis at
University of Cape Town
Department of Physics
PHY2010S
Monday 24th August 2015
Available marks: 33
Full marks: 33
Class Test 1
1) Given E k yz, xz, xy
a) Show that this is a possible electrostatic field.
x
y
Solution: E k
x
yz
(2)
z
y
xz
z
xy
b) Determi
University of Cape Town
Department of Physics
PHY2010S
Friday 14th July 2015
Hand in: Friday 21st August 2015
Problem Set: 04
1) Determine the energy stored in a uniformly charged sphere of radius R and total charge Q
0
2
a) Using U
2
b) Using U
1
V d
2
University of Cape Town
Department of Physics
PHY2010S
Friday 16th October 2015
Available marks: 31
Full marks: 30
Class Test 2
1) A coaxial cable consists of two long concentric conducting tubes, the inner one of radius a and the outer
one of radius b ,