LAB 1
FACULTY OF MECHANICAL AND MANUFACTURING
ENGINEERING TECHNOLOGY
UNIVERSITI TEKNIKAL MALAYSIA MELAKA
BMMA 1333
STATICS
LAB SHEET 1
EQUILIBRIUM OF FORCES FOR 3 POINT LOAD
Learning
Outcome (LO):
LO2
Program
Outcome:
PO4
Synopsis:
Related
Lecture’s
Topic:
Prepared by:
Construct statics experiments to recognize the
engineering mechanics of statics principles.
Conduct
investigations
of
broadly-defined
problems ;locate, search
and select relevant data from
codes, data bases and literature, design
and conduct
experiments to provide valid conclusions.
This lab activity will enrich students’ knowledge on static. Students
are exposed to the concept of equilibrium of forces for 3 point load.
1. Force vectors, vector operations & addition coplanar forces
2. Equilibrium of a particle, the free-body diagram & coplanar force
systems
Ts Mohammad Khalid Bin Wahid
Date 26 October 2020
:
Date
Approved by
LM/SLM/HOD
QMS : REVISION RECORDS
Revision
No
1.
2.
Description
Date
(DD/MM/YY)
Revised Program outcome
21 Mac 2021
&Update Assesment
Checklist
Revised programe outcome
& Update labsheet
31 Mac 2023
Prepared by :
Ahmad Zul Husni
Bin Che Mamat
Siti Norbaya binti
Sahadan
Approved by
LM/SLM/HOD:
INSTRUCTION
1. Laboratory Report shall be in ENGLISH .
2. Submit your report ONCE only in a SINGLE file.
3. Submit your report ONLINE.
4. This lab report/activity accounts for 5% of the total marks for the course.
1.0 INTRODUCTION / THEORY
INTRODUCTION
This lab work topic is on the equilibrium of forces for 3 point load. The data of the
calculated angle (theory) and measured angle (experiment) will be compared.
OBJECTIVES
1. To investigate the conditions required to achieve static equilibrium.
2. To prove the force calculation method using the geometrical method and resolution
of forces method.
3. To compare experimentally obtained results with theoretical calculations.
PART A: THEORETICAL WORK
TASK 1: FIND THE THEORIES
The theory related to this experiment are:
1. Calculation of equilibrium of force using the geometrical methods which are triangle
method and parallelogram law.
2. The calculation for force equilibrium using the resolution of forces method.
3. Method and equation to calculate random error and systematic error. *Please refer
to lecture note.
TASK 1: Write the related theory here
TASK 2 : DRAW THE FREE BODY DIAGRAM
The experiment setup is shown in Figure 1 below. Both weight m1 and weight
m2 are 250g. Therefore, the angle 𝜽�𝟏� is equal to angle 𝜽�𝟐�. Ignore the
weight and friction at the pulleys and cord. Draw the FBD at point A in the box
below.
Figure1: Experiment
Setup
TASK 2: DRAW THE FREE BODY DIAGRAM
TASK 3: Derive the equations and calculate the angles
1. Base on the FBD above, derive the equation of angle ��1 and angle ��2.
2. Record the calculated in Table 1. Start the calculation with 50 g (m3) Calculate for
five different weight in increment order.
TASK 3: Derive the equation here v
TASK 3: Record your calculations in Table 1
Table 1: Theoretical data
Load 3, m3 (g)
Angle 1, θ1 (°)
Angle 2, θ2 (°)
50
5.77
5.77
100
11.55
11.55
150
17.46
17.46
200
23.58
23.58
250
30
30
PART B: EXPERIMENTAL WORK
TASK 4: List of Equipment
The list of equipment is illustrated in Figure 2 as followed:1. LS-13101 Equilibrium of Forces Apparatus
2. Magnetic Pulley x 2
3. Magnetic protractor x 1
6. Weight hanger and set of weights (500g) x 3
Figure 2: LS13101 Equiplibrium of Forces Apparatus LEGEND
A - Mounting Board, B – Protractor, C - Pulley with Magnetic Base, D – Weight
2.0 WORK PROCESS/ PROCEDURES/ METHODOLOGY
TASK 5: WRITE THE PROCEDURE OF EXPERIMENT
Figure 3: 3-point load experimental setup
3.0 RESULTS
TASK 6: Record the experiment data in Table 2
Load 1, m1 = 250g
Load 3, m3
(g)
Load 2, m2 = 250g
Table 2: Experiment data
Angle 1, θ1 (°)
Angle 2, θ2 (°)
50
5
5
100
9
9
150
16
16
200
22
22
250
31
31
TASK 7: Compare theory values with experiment values
Compare calculated values with the one measured from the experiment. Calculate the
error between both results.
TASK 7: Show the calculation sample of error
TASK 7: Record the error analysis here in Table 3
Load 3, m3
(g)
Table 3: Percentage error
Angle 1, θ1 error (%)
Angle 2, θ2 error (%)
50
13.04
13.04
100
22.08
22.08
150
8.36
8.36
200
6.7
6.7
250
3.33
3.33
4.0 DISCUSSION
TASK 8: DISCUSSION
The discussion will be base on the objectives, theoretical values, experimental
values and error calculation. Please including graph in the discussion.What is the
relation between theory and experiment? Please including graph in the
discussion.What is the relation between theory and experiment?
5.0 CONCLUSION
TASK 9: CONCLUSION
Make a general statement from your result. Please refer to the objectives as a
guide.
TASK 9: Write the conclusion here
6.0 REFERENCES / OTHERS
ASSESSMENT CRITERIA:
Your response to each task will be graded separately based on the checklist attached.
To obtain maximum marks, ensure that your response addresses each of the tasks in
the question accordingly.
Assessment checklist for Lab Activity
Assessment tasks
Mark
allocation
LO
PO
C/P/A level
Procedure: Ability to understand the
procedure from lab demonstration
and write the procedure completely.
10
LO2
PO4
P3 –
Guided
response
Work Process: Ability to provide raw
data during the lab session
20
LO2
PO4
P4 –
Mechanism
Outcome (Results):
30
LO2
PO4
P4 –
Mechanism
30
LO2
PO4
P4 –
Mechanism
10
LO2
PO4
P2 – Set
1) Ability to display data in correct
figure and/or table format.
2)Ability to perform calculation for
statics analysis
Outcome (Discussion & Conclusion):
1)Ability to interpret statics data and
trend correctly.
2)Ability to provide observation and
comments related to the
interpretation.
Discipline
TOTAL
100
SPECIFIC INSTRUCTION
1. Answer in ENGLISH.
2. Must include list of references.
3. Submit the lab assessment ONCE only in a SINGLE PDF file.
4. Student will be given until 1 WEEK after the lab session to submit the report. ZERO mark will
be given after the late submission dateline.
5. This lab assessment accounts for 5% of the total marks for the course.
LAB 1
EQUILIBRIUM OF FORCES FOR 3 POINT LOAD
FAKULTITEKNOLOGI
KEJURUTERAAN
MEKANIKAL
DANPEMBUATAN
UNIVERSITI
TEKNIKAL
MALAYSIA
MELAKA
BMMA1333
STATICS(STATIK)
INSTRUCTOR’S
NAME
STUDENT’S NAME
MATRIX NO:
SIAU XUE BIN
B092210260
S1.
S2.
S3.
S4.
S5.
ASSESSEMENT RUBRICS
GIVEN MARKS
MARK
ALLOCATION S1
ASSESSMENT TASK/ITEMS
1. Procedure: Ability to understand the
procedure from lab demonstration and
write the procedure completely.
2. Work Process: Ability to provide raw
data during the lab session
3. Outcome (Results):
3)Ability to display data in correct
figure and/or table format.
4)Ability to perform calculation for
statics analysis
4. Outcome (Discussion & Conclusion):
1)
Ability to interpret statics data
and trend correctly.
2)
Ability to provide observation
and comments related to the
interpretation.
5. Discipline
TOTAL MARKS
S2
S3
S4
S5
10
20
30
30
10
100
Approved By: ………………………………………………..…..
(Instructor’s Signature & Stamp)
Date: …………………………………………….........
Item
Description
Ability to
understand
the procedure
from lab
Procedure
demonstration
and write the
procedure
completely
Work
Process
Ability to
provide raw
data during
the lab
session
Show results
(Simulation
and/or
Hardware)
Very Weak
0
Modest
2
Major written
procedures
are missing
from lab
session and
incorrect
Unable to
Minimum
ability
to provide raw
provide raw
data during
the lab
session
No record of
results at all in
any form.
No
interpretation of
trends and
comparison of
data,
observation
and conclusion
indicating a
lack
of
understanding
of results.
Ability to obey
the punctuality Late report
Discipline
and due date submission
submission
Good
3
Excellent
4
Some written All procedures
procedures
are good
are missing
written stated
from lab
from lab
session
session
demonstration demonstration
but
but could still
acceptable
be improved
Able to
Most of the
process
provided raw
Unable to
identify
procedures
from lab
session and
totally wrong
Outcome
Discussion &
Conclusion
Weak
1
All procedures
are well written
completely
from lab
session
demonstration
without
missing
All of the raw
data are
data during processed and
correlate with
the lab
lab experiment
session
correctly being perfectly
processed.
provide raw
data during
the
lab
session
data during
the lab
session but
Data, figures,
graphs,
tables,
diagrams,
contain errors
or are poorly
constructed,
have missing
titles,
captions,
labeled or
numbers,
units missing
or incorrect,
etc.
All data,
figures,
All data,
Most data,
graphs,
figures,
figures,
graphs, tables, tables,
graphs,
diagram, are diagrams are
tables,
correctly
diagram are correctly
drawn, are
recorded,
drawn, and
numbered,
some labeled labeled but
are labeled
still missing
some have
and contain
some
minor
titles/captions.
important or
problems or
required
could still be
features
improved
Incomplete or
incorrect
interpretation
of trends and
comparison of
data,
observation
and
conclusion
indicating a
lack of
understanding
of results.
Late attend on
lab session
still
incomplete
All important
trends and
data
comparisons
have been
interpreted
correctly and
discussed.
Understanding
of results is
conveyed
through
observation
and
comments.
Conform to all Conform to all Conform to all
criteria but
criteria and
criteria and
passive in lab
active during
activities
lab activities
Some of the
results have Almost all of
been correctly the results
have been
interpreted
correctly
and
interpreted
discussed;
and
understanding discussed.
of
Observation
results is still and comments
evident,
are good.
observation Requires only
and
minor
comments are improvements.
acceptable.
workable
during lab
activities
14