Omm Al-Qura University
Dr. Abdulsalam Ai
LECTURE OUTLINE
CHAPTER 3
Vectors in Physics
3-1 Scalars Versus Vectors
Scalar a numerical value
(number with units). May
be positive or negative.
Examples: temperature,
speed, height, and mass.
Vector a quantity w
Umm Al-Qura University
Dr. Abdulsalam Ali
LECTURE OUTLINE
CHAPTER 16
TEMPERATURE
AND HEAT
16-1 Temperature and the Zeroth Law
of Thermodynamics
Definition of Temperature:
is a measurement of the average kinetic energy of the
molecules in an object or syst
Umm Al-Qura University
Physics 101
Lecture 1
Lecturer:
Dr. Abdulsalam Ali Soud
Dr. Abdulsalam Ali
Umm Al-Qura University
Dr. Abdulsalam Ali
Course Text Book
Course Text Book
Physics 4th
By
James S. Walker
Umm Al-Qura University
COURSE SYLLABUS
Week No.
Co
Chapter 15:- Fluids
Q2)
1gallon = 3.79 103 m 3
so
3.79 103 m 3
25 gallon
= 94.75 103 m 3
1gallon
w = 1000kg / m 3
mw = wV = 1000 94.75 10 3 = 94.75kg
W = mg = 94.75 9.81 = 929.5N
Q5)
V = (3.21102 m )3 = 3.31105 m 3
=
m
0.347
=
= 10493kg / m 3
V
3.31105
F
Exercises for Chapter 5
2)
The weight of the rock = 40 N (downward)
The force exerted by the astronaut = 46.2 N (upward)
The net force acting on the rock = 46.2 40 = 6.2 N
a=
F 6.2
= 1.24 m/s2
=
m
5
3)
First we find a,
a=
F 10.1
= 0.821 m/s2
=
m 12.3
Now
Chapter 14
Waves and sound
Q4)
v = 750km / h = 750x 103 / 3600s
v = 208.33m / s
= 310km = 310x 103 m
f =
v
=
208.33
= 6.7x 103 Hz
310x 103
Q8)
f 2 = 2f 1
but
v 2 =v1
but
2 =
v 2 v1 1 v 1
=
= = 1
f 2 2f 1 2 f 1 2
Note : force does not change so the speed
Exercises for Chapter 7
5)
W = Fd
So F =
W
201
= 42.77 N.
=
d
4.7
But F = mg
Or, m =
F 42.77
= 4.36 kg.
=
g
9.8
12)
W = Fd cos
= 115 8 cos 43.5 = 667 J.
13)
a)
W = Fd cos = 50 0.5 cos 55 = 14.34 J.
b)
W = Fd cos = 50 0.5 cos 65 = 10.57 J, so work decrease
Exercise for Chapter 3
8)
a)
rx = r cos = 75 cos 35 = 61.44 m
ry = r sin = 75 sin 35 = 43.02 m
b)
rx = r cos = 75 cos 65 = 31.7 m
ry = r sin = 75 sin 65 = 67.97 m
12)
a)
r
= tan 1 ( y ) = tan 1 (
rx
9.5
) = - 34.16
14
b)
r = rx2 + ry2 = (14) 2 + (9.5) 2
Exercises for Chapter 1
2)
a)
1 m = 10-6 m ( = micro or micron)
So, 70 m = 70 10-6 m, or 7 10-5 m
b)
1 m = 10-9 km
So, 70 m = 70 10-9 km, or 7 10-8 km
3)
1 Gm = 109 m
So, 0.3 Gm/s = 0.3 109 m/s, or 3 108 m/s
4)
136.8 teracalculations = 136.8 1012 calculat
Exercise for Chapter 2
For simplicity, in these exercises x0 is always assumed to be zero.
43)
vo = 81.9 m/s
x = 949 m
v=0
v2 = vo2 + 2ax
0 = (81.9)2 + 2 949 a
a = - (81.9)2/(2 949) = - 3.53 m/s2
so a is 3.53 m/s2 to the north.
47)
a) not required.
b)
vo
Umm Al-Qura University
Dr. Abdulsalam Ali
LECTURE OUTLINE
CHAPTER 2
One-Dimensional
Kinematics
2-1 Position, Distance, and Displacement
Position
Before describing motion, you must set up a
coordinate system define an origin and a positive
direction.
Umm A
LECTURE OUTLINE
CHAPTER 5
Newtons Laws
of Motion
5-1 Force and Mass
Force: push or pull
Force is a vector it has magnitude and direction
Mass is the measure of how hard it is to change an
objects velocity.
5-2 Newtons First Law of Motion.
Newton's first l
LECTURE OUTLINE
CHAPTER 7
Work and
Kinetic Energy
7-1 Work Done by a Constant Force
The definition of work, when the force is parallel to
the displacement:
SI unit: newton-meter (Nm) = joule, J
Work is a scalar quantity.
7-1 Work Done by a Constant Force
Umm Al-Qura University
1
Dr. Abdulsalam Ali
LECTURE OUTLINE
CHAPTER 14
Waves and
Sound
Umm Al-Qura University
Dr. Abdulsalam Ali
14-1 Types of Waves
2
A wave:
Is a disturbance that propagates from one place
to another.
1- Transverse Wave:
The displacement