The Hong Kong University of Science and Technology
PHYS 1112

Spring 2014
MOMENTUM, IMPULSE, AND
COLLISIONS I
PHYS1112
Lecture 7
PHYS1112 spring 2014
1
Intended Learning Outcomes
After this lecture you will learn:
1) impulse as an indication of the effect of a force
which is in effect for a short time.
2) the relation between
The Hong Kong University of Science and Technology
PHYS 1112

Spring 2014
PHYS1112 Tutorial 3
Name_Student ID _
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) In the figure, a constant external force P = 160 N is applied to a 20.0kg box, which is on a rough
horizontal
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2014
PHYS1112 Tutorial 6
Name_Student ID _
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) A light triangular plate OAB is in a horizontal plane. Three forces, F1 = 6.0 N, F2 = 9.0 N, and
1)
F3 = 7.0 N,
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2014
PHYS1112 Tutorial 9
Name_
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
1) A 5.0kg block is attached to an ideal massless spring whose spring constant is 125 N/m.
The block is pulled from its equilibri
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2014
PHYS1112 Tutorial 2
Mengyuan He
Department of Physics
!
!
!
9/9/2014
Outline
Basic concepts of motion
Differentiation of vectors
Projectile motion
Relative velocity
Basic Concepts of Motion
&
Differentiation of Vectors
Problem Set 1: Basic concept
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2014
PHYS1112 Tutorial 12
Mengyuan He
Department of Physics
!
!
!
25/11/2014
Outline
First Law of Thermodynamics
Heat Capacity of Ideal Gas
Adiabatic Processes
First Law of Thermodynamics
First law: energy conservation in thermodynamics including heat
U =Q
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 11 Electrostatics
Page 1
Chapter 11 Electrostatics
11.1
Introduction

Electrostatics is the study of electric charges at rest, the electric forces and field
associated with them and the electrical potential and electrical potential energy
acquired by
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 10 Thermodynamics
Page 1
Chapter 10 Thermodynamics
10.1 Heat, Work and Internal Energy
*
Heat is the energy transferred from one body at a higher temperature to another at a
lower temperature by conduction, convection or radiation.
*
Work is the energy
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch9 Gases and Thermodynamics
page 1
Chapter 9 Gases
9.1 Macroscopic view
9.1.1 Gas Laws
* In macroscopic world, the thermodynamic state of gas is determined by its
pressure (P), temperature (T) and volume (V).
* Boyles law
In 1660, Robert Boyle found that
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 12 Current Electricity
Page 1
Chapter 12 Current electricity
12.1
Electric current
12.1.1
Charge and current

12.1.2
Charge carriers

12.1.3
I = Q/t
(1A = 1C s1)
Conventional current I is taken to be in the direction of movement of
positive chargec
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Chapter 8 Fluids
8.1 Fluid
*
A fluid is a substance that can flow. It can be considered to be a collective term
embracing liquids and gases.
8.1.1
Density of a fluid
* It is the mass per unit volume.
* The density of a fluid at a point refers the limit of
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 15 Electromagnetic Induction
Page 1
Chapter 15 Electromagnetic Induction
15.1
Magnetic flux

Like electric flux, magnetic flux through an area is directly proportional to the
number of magnetic field lines passing the area perpendicularly.
By definiti
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
6.1 Vector product
*
*
If C A B , then C is called the vector product or the cross product of A and
B.
The magnitude and direction of the vector product is defined as:
(1) Magnitude:
C A B
(2)
C A B sin
where is the angle between A and B .
Direction:
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 14 Magnetism
Page 1
Chapter 14 Magnetism
14.1
Magnetic field


To investigate the effect of magnetic field on current, we define the concept of test
current element. A test current element is known as the current I multiplied by the
small length L of
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 13 Capacitance
page 1
Chapter 13 Capacitance
13.1
Capacitors

A capacitor is a device that can store charge.

A common capacitor basically consists of two conductors, such as a pair of
parallel metal plates, separated by an insulator (dielectric).

The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Chapter 7 Solids
7.1 Microscopic structure
*
All matter consists of atoms. One or a few atoms may form a molecule.
*
In a solid, atoms are close together when compared to a gas. Atoms interact strongly
with each other all the time. Nevertheless, they ofte
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 52 Energy in SHM
Page 1
5.5 Energy in SHM
5.5.1
Energy in springmass system
*
*
Kinetic energy =
*
5.5.2
Potential energy =
Total energy =
1
kx 2
2
1
mv 2
2
1 2 1
1
kx mv 2 m 2 A 2 (Prove it yourself!)
2
2
2
Energy in simple pendulum
*
5.5.3
1
m 2 l
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 51 Simple Harmonic Motion
Page 1
Chapter 5 Simple Harmonic Motion
5.1 Description of SHM
5.1.1
Introduction
*
Simple harmonic motion is one that satisfies the following relation:
a = 2x
where a is the acceleration of the body and x is the displacement
The Hong Kong University of Science and Technology
General Physics I
PHYS 1112

Fall 2015
(PHYS111)[2010](f)midterm~=tkk933^_29822.pdf downloaded by clcheungac from http:/petergao.net/ustpastpaper/down.php?course=PHYS111&id=17 at 20141210 03:07:37. Academic use within HKUST only.
Physics 111 (Fall 2010) Midterm Solution
1) (a) Time that the
The Hong Kong University of Science and Technology
General Physics I
PHYS 1112

Fall 2015
(PHYS111)[2010](f)midterm~=tkk933^_39354.pdf downloaded by clcheungac from http:/petergao.net/ustpastpaper/down.php?course=PHYS111&id=18 at 20141210 03:07:36. Academic use within HKUST only.
Physics 111 (Fall 2010) Midterm
27 October, 2010
Total: 60 mar
The Hong Kong University of Science and Technology
General Physics I
PHYS 1112

Fall 2015
(PHYS121)[2006](f)final~2678^_10005.pdf downloaded by clcheungac from http:/petergao.net/ustpastpaper/down.php?course=PHYS121&id=0 at 20141210 03:08:48. Academic use within HKUST only.
PHYS121 Fundamentals of Physics
Fall 2006
Final Examination
8:30 11:
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 21 Newtonian Mechanics
Page 1
Chapter 2 Newtonian Mechanics
Newtonian mechanics is mainly based on the following postulates:
1.
The principle of relativity: The laws of physics are the same in all inertial reference
frames.
2.
Time is absolute: Time i
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Supplementary Notes
Relative Velocity
*
An absolutely rest object does not exist. Imagine your speed relative to the center of the
Earth, or relative to the Sun.
*
Velocity is a relative term. One must say a car is traveling at 70km/hr relative to the gro
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 12 Twodim motion (Projectile motion)
Page 1
1.2 Twodimensional motion (Projectile motion)
1.2.1
Projectile motion
The motion influenced only by constant gravitational force mg (downwards).
It is a twodimensional motion.
y
x
Take the upward directio
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 11 Kinematics
Page 1
Chapter 1 Kinematics
1.1 Motion along a line
1.1.1
Scalar and vector quantity
Scalar quantity: 
A quantity described by a magnitude only
e.g. mass, time, distance, speed, density, energy, temperature.
Vector quantity: 
A quantit
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 22 Work, Energy and Linear Momentum
Page 1
2.2 Work, Energy and Linear Momentum
2.2.1
Work
Infinitesimal Work (Displacement is small.)
dW F ds
For large displacement
x1
F ds
W
Properties of work:
x0
1. If F1 and F2 are two forces acting on a body, t
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 62 Rotational dynamics
Page 1
6.6 Rotational dynamics
6.6.1 Kinetic energy
*
The kinetic energy of a rotating rigid body consisting of N particles is given by
K.E. = (1/2) m1 v12 + (1/2) m2 v22 + (1/2) m3 v32 + + (1/2) mN vN2
= (1/2) m1 r12 2 + (1/2)
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Page 1
Ch 4 Gravitation
Chapter 4 Gravitation
4.1 Newtons law of gravitation
Every particle of matter in the universe attracts every other particle with a force which is
directly proportional to the product of their masses and inversely proportional to th
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Ch 61 Moments of force
Page 1
Chapter 6 Moments of force and rotational dynamics
6.1 Kinematics of Rotation of a rigid body
*
For simplicity, we only consider rotation about a fixed axis. Since the rotation can
either be clockwise or anticlockwise, we on
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2013
Tsuen Wan Government Secondary School
Mock Examination 1998/1999
Instructions
1. The paper is consists of Section A and Section B
2. Section A consists of 6 short questions, all of which are to be attempted. The total
mark is Section A is 30.
3. Section B
The Hong Kong University of Science and Technology
PHYS 1112

Fall 2014
Chapter 28
Problem 1
Solution 1:
Problem 2
Solution 2
Problem 3
Solution 3
Problem 4
A very large parallelplate capacitor carries charge with uniform charge per unit area + on the upper plate
and on the lower plate. Both plates are moving along +x direct