Description
do lab writing expectations found in the lab writing pictues
purpose section , theory section, procedure, questions,conclusion
(zoom in to read pictures)
good luck thank you did
Unformatted Attachment Preview
Purchase answer to see full attachment
Explanation & Answer
Attached.
Running head: LAB 7 STATIC AND KINETIC FRICTION
Determination of Static and Kinetic Friction
Name:
Institutional Affiliation:
1
LAB 7 STATIC AND KINETIC FRICTION
2
Static and Kinetic Friction
Objective
This paper aims at carrying out experiment for determination of the coefficient of kinetic and
static friction.
Theory
There is always a force that prevents an object from starting a movement, and this is the static
friction when the force is applied that is greater than this friction is applied. Static friction can be
presented as Fstatic sN .
Ms Represents the static friction coefficient, letter N is for the
normal existing force which is applied on the external layer. Upon moving object, force must be
kept constant or else it will slow down, and the movement will cease. Kinetic friction is the
friction on the object that is moving, and it is also known as “sliding friction.” For the object to
stay in motion, at a constant velocity, then the application of force that is equivalent to the
reaction force of the kinetic friction. Fkinetic =
k N.
k represent the kinetic friction and N is
for the normal friction acting on the object. The minimum angle when an object begins to slide
on an inclined plane is called angle of the response, and it is expressed as μs = tan θ. The slide
angle in an inclined plane at a constant velocity is an angle when μ s = tan θ is satisfied.
Procedure
The table was made as smooth as possible then a mass of a box was measured after which
the force sensor was connected to channel 1 of Lab pro interface the Logger Pro 3.12 was switch
on. The range switch on the force was then switched Force sensor to 50 N. The process was
followed by clicking “open” followed by “Force Sensors” then “Dual Range Force” and lastly
“50 N Dual Range.” The graph that appeared is calibrated by clicking “Experiment on the
“calibration” which is followed by “perform now.” The scale is then zeroed and 500g is hanged
LAB 7 STATIC AND KINETIC FRICTION
3
on a hook by the use of a rubber band. The force sensor was held in position for pulling the
object without tension on the string, and the zero buttons was clicked for setting the force sensor
to zero. To collect data collect was clicked and the block was pulled with a gradual increase in
force, and the process was repeated.
Part II: Peak Kinetic Friction and Static Friction
The mass was then detached from block was to collect data and dragged for gathering force vs.
time data. Examination of the data was done by ticking static mark and the extreme value of
force that occurred as the block started to slide. The data was then read and collected on the d ata
table. It was then pulled across the region of the graph which matched up to block moved at a
constant velocity, and the statistic button was clicked again and the average force during the
interval time was read. The force is the enormousness of the kinetic friction force. The process
was repeated, and the average measured and recorded. The mass of 200 g was added to the block
and the data repeated with the addition of mass as the value being recorded.
Part III:
Part I Starting Friction
Mass of block
0.3065 kg
Part II: Peak Static Friction and Kinetic Friction
Total
Normal
mass
1.3015
force
12.804
1.1065
(m)
.9015
Peak static friction
Trial 1
Trial 2
Trial 3
6.36
5.79
6.04
10.844
(N)
8.844
5.53
5.69
5.18
5.15
5.28
4.65
.7065
6.924
3.46
3.40
3.58
.5065
4.967
2.97
2.47
2.87
Average
peak static
friction
6.06
5.47
(N)
5.03
3.48
2.77
LAB 7 STATIC AND KINETIC FRICTION
4
Total
Normal
Peak static friction
Trial 1
Trial 2
Trial 3
Average
peak static
mass
1.3015
force
12.804
3.494
3.549
3.317
1.1065
(m)
.9015
.7065
10.844
(N)
8.844
6.924
2.905
3.721
2.307
2.905
1.808
2.936
1.625
1.892
1.957
2.644
(N)
2.119
1.797
.5065
4.967
1.185
1.36
1.414
1.321
friction
3.436
3
Part III
Data: Block with no additional Mass
Trial
Acceleration (m/s2 )
Ra
Kinetic Friction Force
μs
(N)
1
3.488
1.064
.3559
2
3.179
2.564
.3244
3
2.629
2.120
.2683
4
2.793
2.253
.2850
5
2.684
2.163
.2739
.3015
Data: Block with no additional Mass
Trial
Acceleration (m/s2 )
Kinetic Friction Force
μs
(N)
1
2.465
.7555
.2515
2
2.451
.7512
.2501
LAB 7 STATIC AND KINETIC FRICTION
5
3
2.782
.8525
.2839
4
1.553
.8725
.2605
5
2.427
.7439
.2477
.2587
Calculation and Graphs
The numeric value of the slope in the graph of Peak Static vs. Normal for represents the
static friction. The fitted of the data that was used to make th...