J3010 - Mechanics of Machines 1

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MALAYSIAN
POLYTECHNICS
MINISTRY OF EDUCATION
MODULE J3010
MECHANICS OF MACHINES 1
Zainol Hashim (POLIMAS)
Harisa Mohamad Saad (POLIMAS)
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BIODATA OF MODULE WRITERS
J3010 Mechanics Machines
Name : Zainol Bin Hashim
Address : Mechanical Engineering Department
Politeknik Sultan Abdul Halim
Mua’dzam Shah, Bandar Darulaman
06000 Jitra
Kedah Darulaman
Telephone No. : 04-9174701 ext.407
Qualifications : B Sc Mech. Eng.(UTM)
Diploma Mech. Eng (UTM)
Cert.Education
Position : Polytechnic Lecturer
Name : Harisa Bt Mohamad Saad
Address : Mechanical Engineering Department
Politeknik Sultan Abdul Halim
Muadzam Shah, Bandar Darulaman
06000 Jitra
Kedah Darulaman
Telephone No. : 04-9174701 ext.822
Qualifications : B Eng. Agricultural (Food and Process)
(UPM)
Masters in Education (ITTHO)
Position : Polytechnic Lecturer

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What Do You Think Of This Module?
Title of Module: _______________________ Module Code : ___________
Student’s Name: _______________________ Registration No. : ___________
Course : ____________________________________
Module Writers: ______________________________
Please use the following scale for your evaluation:
4 Strongly Agree
3 Agree
2 Disagree
1 Strongly Disagree
Instruction : Please  on the space provided.
No. How much do you agree with the following statements? SCALE
A. FORMAT 1 2 3 4
1 The pages are organized in an interesting manner.
2 The font size makes it easy for me to read the module.
The size and types of pictures and charts used are suitable for
3
the input.
4 The pictures and charts are easy to read and understand.
5 The tables used are well-organised and easy to understand.
6 The arrangement of the Input makes it easy for me to follow.
7 All the instructions are displayed clearly.
B. CONTENTS 1 2 3 4
8 I understand all the objectives clearly.
9 I understand the ideas conveyed.
10 The ideas are presented in an interesting manner.
11 All the instructions are easy to understand.
12 I can carry out the instructions in this module.
13 I can answer the questions in the activities easily.
14 I can answer the questions in the self-assessment.
15 The feedback section can help me identify my mistakes.
16 The language used is easy to understand.
17 The way the module is written makes it interesting to read.
18 I can follow this module easily.
19 Each unit helps me understand the topic better.
I have become more interested in the subject after using this
20
module.

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CURRICULUM GRID
The curriculum grid of this module is based on the curriculum used by Malaysian
polytechnics.
No. TOPIC UNIT Total
Hours
1 General 1 9 Hours
Dynamics ( 9 H)
2 Moment 2 6 Hours
Inertia ( 6 H)
3 Hoisting 3 6 Hours
system (6H)
4 Friction 4 6 Hours
(6H)
5 Screw 5 6 Hours
(6 H )
6 Belting 6 9 Hours
(9H)

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UNIT 1 GENERAL DYNAMICS
1.1 Velocity and Acceleration
1.2 Equation for linear, uniformly accelerated motion
1.3 Relationship between linear speed and angular speed
1.4 Relationship between linear acceleration and
angular acceleration
1.5 Work done by a constant force
1.6 Power
1.7 Energy and conservation of energy
1.8 Momentum and conservation of momentum
UNIT 2 MOMENT OF INERTIA
2.1 Moment of Inertia
2.2 Theorem of Parallel axes
2.3 Theorem of Perpendicular axes
2.4 Moment of Inertia in a few simple cases
2.5 Torque and Angular Acceleration
2.6 Angular Momentum
2.7 Angular impulse
2.8 Work done by a torque
2.9 Angular kinetic energy
2.10 Kinetic energy of a torque
UNIT 3 HOISTING SYSTEM
3.1 Inertia Couple
3.2 Accelerated Shaft
3.3 Shaft being brought to rest
3.4 Load raised and with accelerating upward
3.5 Load falling and accelerating downwards (No driving torque
acting)
3.6 Load falling and being brought to rest
3.7 Load rising: Coming to rest under friction only
3.8 Load balancing system

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UNIT 4 FRICTION
4.1 Motion up the plane: pull P parallel to plane
4.2 Motion down the plane: Pull P parallel to plane
4.3 The angle of friction and total reaction
4.4 Application of angle of friction to motion on the inclined
plane
UNIT 5 SCREW
5.1 The square thread screw
5.2 The V- thread screw
5.3 Raising Load
5.4 Load being lowered
5.2 Overhauling of a screw
UNIT 6 BELTING
6.1 Length of an open belt drive
6.2 Length of cross belt drive
6.3 Power transmitted by a belt
6.4 Ratio of tensions
6.5 Centrifugal tension

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MODULE GUIDELINES
To achieve maximum benefits in using this module, students must follow the
instructions carefully and complete all the activities.
1. This module is divided into 6 units.
2. Each page is numbered according to the subject code, unit and page number.
J3010 / UNIT 1 / 5
Subject Unit 1 Page Number 5
3. The general and specific objectives are given at the beginning of each unit.
4. The activities in each unit are arranged in a sequential order and the
following symbols are given:
OBJECTIVES
The general and specific objectives for each learning topic are stated
in this section.
INPUT
This section introduces the subject matter that you are going to learn.
ACTIVITIES
The activities in this section test your understanding of the subject
matter. You have to complete this section by following the
instructions carefully.

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FEEDBACK
Answers to the questions in the activity section are given here
SELF-ASSESSMENT
Self-assessment evaluates your understanding of each unit.
FEEDBACK ON SELF-ASSESSMENT
This section contains answers to the activities in the self-assessment.
5. You have to follow the units in sequence.
6. You may proceed to the next unit after successfully completing the unit and
you are confident of your achievement.

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GENERAL AIMS
This module is prepared for students in the third or fourth semester who are
undergoing the Certificate/Diploma programmes in Malaysian Polytechnics. It aims
to expose students to the mechanics of machines concept in each unit and to lead
them towards self-directed learning or with guidance from their lecturers.
PRE REQUISITE SKILLS AND KNOWLEDGE
The pre-requisite for this module is at least a pass in Mathematic at the SPM level
and the successful completion of the Engineering Science module in the first
semester.
GENERAL OBJECTIVES
At the end of this module, students should be able to:
1. know principles and fundamental concept of general dynamics.
2. know method and procedures to solve problem of mechanics machines.
3. understand facts and principles all of these topics.
4. solve problem in relation to hoisting and friction.
5. solve problem of raising and lowering load for square and Vee threaded screw.
6. find the values of Belting by using a calculator.
TEACHING AIDS AND RESOURCES NEEDED
1. Calculator

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REFERENCES
1. John Hannah and M.J. Hillier (1971). Applied Mechanics; New Zealand
Pitman: Publishing Limited.
2. W. Madill (1984). Applied Mechanics Level 3; Longman Inc., New
York: Longman Group Limited.
3. D Humphrey and J Topping (1971). A Shorter Intermediate Mechanics;
London: Longman Group Ltd.
4. George E. Drabble (1971). Applied Mechanics; London: W.H. Allen & Co.
Ltd.
5. R.S. Khurmi (1988). A Text Book Of Applied Mechanics;New Delhi:
S. Chand & Company (Pvt) Ltd.
6. R.K. Mullis (1983). Engineering Mechanics; Longman Cheshire Pty.
7. S.B.Mathur (1979). Applied mechanics; Delhi: Khanna Publishers.
8. L.Bostock and S.Chandler (1979). Applied Mathematics; Scotland: Thomson
Litho Ltd.