- Information
- AI Chat
E102 LAB Report Friction
PHYSICS FOR ENGINEERING - LABORATORY (PHYS101L)
Mapúa University
Recommended for you
Preview text
PHYS101L/B
E102 - LAB REPORT
(FRICTION)
Mandanas, Denielle John M. Macaranas, Nykoal Kody Mancilla, Gabriel Marquez, Paulluz Christian V. Pagsanghan, Allysa R. Udarbe, Limwei
ABSTRACT
The purpose of this experiment is to investigate how friction works, to see if the velocity is uniform as an object slides in a track, and to identify the angle of repose when the track is inclined to the flat surface. This experimental procedure is the first thing we do to test whether the velocity of the block is stable when the track is on a flat surface. Second, test the velocity of the block when the track is inclined to the surface. The results of this experiment can be found at the bottom of this lab report. An object's velocity is considered constant relative to its velocity, whether the track is flat or the surface is inclined. Macaranas, Nykoal Kody
Keywords: Friction, Velocity, Inclined
Introduction
Friction is the force exerted against or opposed to a moving item. Two surfaces that come into contact and glide against one another produce frictional force. It can either be static friction or dynamic friction. Between two or more objects that are not moving relative to one another, there occurs friction known as static friction. Kinetic friction, on the other hand, develops resistance between two or more moving objects (General Data Protection Regulation(GDPR) Guidelines BYJU'S, 2021).
The angle of repose is the angle that an inclined plane makes when a body slides down it. This experiment tries to establish the relationship between the angle of repose and the coefficient friction between various surfaces that are in touch when the object slides on the surface in a uniform motion. We are tasked with measuring the coefficient of friction for the first phase of the experiment by sliding the block across the large side (Felt) first, then adding weights until a uniform motion is seen. Five trials should be completed before using the blocks' narrow side (Wooden), and further weights should
be added until a uniform sliding motion is seen. Calculating friction's coefficient then follows. By angling the dynamics track until the block moves in a uniform motion, the second stage of the experiment determines the angle of repose. Following that, it will be possible to compute the angle of repose.
Mandanas, Denielle John M.
Materials and Methods
- 1 string
- 1 pc meter stick
- 1 pc mass hanger
- 1 pc block (with different surfaces)
- 1 pc digital balance
- 1 pc dynamics track with pulley
- 1 set weights
The test was split into two sections: (1) finding the coefficient of friction, and (2) Finding the repose angle.
I. Finding the coefficient of friction
Our group weighs the mass hanger and the pan using the digital balance because the results of this will change how the experiment's findings turn out.
The pulley and dynamic track were set horizontally on the table. The block was positioned horizontally with the felt side facing the pulley dynamics track.
To link the two, we fasten the block's hook to one end of the string and the mass hanger's hook to the other. We also adjust the length of the string as necessary to allow the block space to move across the plane's surface.
Then, the mass hanger should then be allowed to hang from the dynamics track's end.
Our group then analyzes how much weight will be used, how much mass it will have, and how that will affect the block's movement.
The group raised the mass hanger's weight during the initial attempt while keeping the pan's weight constant.
We then made numerous attempts to see if the block continued to slide along the plane consistently. Every time we added a different weight to the mass hanger and the top of the block, if we noticed any uniform sliding motion, we recorded it and tried a different weight until we saw the block slide along the plane uniformly. It is recommended to record 5 consistent sliding motion attempts.
After that, our group computed the average value of the friction coefficient after recording the combined weights of the mass hanger, the pan, and the block on the datasheet.
Lastly, repeat steps five to eight utilizing the narrower side of the wooden surface.
Table 1b. Determination of the Coefficient of Friction (Narrow Wooden Side of the Block) In this table set of experiments, we used the narrow side of the wooden surface block. We then continue adding and subtracting weights until a uniform speed is observed.
We were able to determine the Coefficient of friction μ and the Average Coefficient of friction μ through these formulas: (Coefficient of friction)
μ = 𝑚𝑀
where, m = pan with mass M = block with mass
(Average Coefficient of Friction) μ' =
μ 1 +μ 2 +μ 3 +μ 4 +μ 5 5
The two tables illustrate that the area of the block facing the surface has no significant impact on the
coefficient of friction because there is very little difference between the average coefficient of friction
when using the larger side of the felt surface block and the average coefficient of friction when using
the narrow side of the surface block.
Table 2. Determination of the Angle of Repose In this table, we used the larger side of the felt surface block. We then gradually inclined the dynamics track until we saw the block glide down the platform with consistent speed.
We were able to determine the angle of repose through these formulas: (Angle of Repose in Decimal)
𝑡𝑎𝑛 θ = ℎ 𝐿 where, h = vertical height L = horizontal distance
(Angle of Repose in Degree) 𝑡𝑎𝑛
− μ = θ
Table 2 shows that the coefficient of friction calculated using the block's larger felt side and narrow wooden side is remarkably similar to the coefficient of friction calculated using the angle of repose.
Mancilla, Gabriel Pagsanghan, Allysa
Conclusion
Friction has various uses in our everyday life. It is the friction in the road that allows us to walk upright; otherwise, we would continuously slide to the lowest point.
When the block passes and travels in its uniform state of motion, its coefficient of friction remains constant. And since friction acts in the reverse direction as the net force, the net force would increase as the block's mass increases making it possible for the block to achieve its state of inertia. It was shown that the pan was openly held from the string while the block was placed on a horizontal surface. The bodies' accelerations are equal in magnitude, as are the forces that the string's tension exerts on each body. And a block on an inclined plane will slide uniformly on an inclined plane due to its mass having an angle of repose. Moreover, the tangent of the angle of repose was perceived to always be similar to the coefficient of friction and it would not change no matter what the weight of the block is. It strongly suggests the connection between friction force, normal force, and mass. By rolling a ball whether on a rough or soft surface. This lab experiment can help us understand various scenarios where friction is present and can be observed.
Marquez, Paulluz Christian V.
References
What is friction? (article). (n.). Khan Academy. khanacademy/science/physics/forces-newtons-laws/inclined-planes-friction/a/what-is-f riction.
Table 2
Vertical height = 36cm
Horizontal distance = 118cm
Solution:
𝑡𝑎𝑛 θ = ℎ𝐿
𝑡𝑎𝑛 θ = 36𝑐𝑚 118𝑐𝑚 =0. 31
𝑡𝑎𝑛 − μ = θ
𝑡𝑎𝑛 − μ =17. 22°
E102 LAB Report Friction
Course: PHYSICS FOR ENGINEERING - LABORATORY (PHYS101L)
University: Mapúa University
- Discover more from:
