Chapter 4 conclusion and recommendations
[Overtype title of experiment here]
Experiment conducted on [overtype date of experiment here]
Student Name: [Overtype your name here]
Student Number: [Overtype student number here]
103 Borough Road, London, SE1 0AA
www.lsbu.ac.uk
Chapter 1 Introduction 4
Chapter 2 Apparatus and experimental
References 15
Summary
Chapter 1 : Introduction
Types of friction:
Dry friction : resists relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction between non-moving surfaces, and kinetic friction between moving surfaces.
Fluid Friction : describes the friction between layers within a viscous fluid that are moving relative to each other.
non-moving surfaces, and kinetic friction (sometimes called sliding
friction or dynamic friction) between moving surfaces. Coulomb
Ff is the force of friction exerted by each surface on the other. It is
parallel to the surface, in a direction opposite to the net applied force.
Motion of object on Inclined Plane
Figure [1] : Free Body Diagram of an object on inclined plane
Since the block has a tendency to slide down, the frictional force
Thus at the angle at which it slides down we have
where θ is the angle from vertical and µs is the static coefficient of
friction between the objects.
Static Friction :
coefficient of kinetic friction.
KINETIC FRICTION
materials.
CHAPTER 2 Apparatus and experimental procedure
Apparatus
Table 2.1 : List of Apparatus for static friction experiment
| Serial No | Name of Apparatus | Quantity |
|---|---|---|
| 1. | Adjustable Stainless steel plane | 1 |
| 2. | Empty trays with bases of Aluminium , brass, nylon , frodo | 4 |
| 3. | Scientific Calculator | 1 |
| 4. | Camera | 1 |
Table 2.1 : List of Apparatus for Kinetic friction experiment (Uphill)
Experimental Procedure : Static Friction
Ensure the stainless steel base is level
Catcher gets into the position to avoid any accidents
Locker watches the empty tray and directs the Tipper to stop
Experimental Procedure : SLIDING Friction (UPHILL)
Adjust the angle of machine to 10 degrees
Catcher places the nylon ray at the bottom of the steel lane
Note taker records the weight required for continuous motion
Repeat with an additional 10N of weights
CHapter 3 Calculations and results
STATIC friction Experiment
| Serial No | Type | Angle (in degrees) | Frictional Coefficient |
|---|---|---|---|
| 1. | Aluminium | 19.5 | 0.35 |
| 2. | Brass | 15.0 | 0.268 |
| 3. | Nylon | 14.3 | 0.255 |
| 4. | Steel | 13.16 | 0.234 |
SLiding friction Experiment
Coefficient of friction = tan (theta)
Sliding Friction Experiment (uphills)
| Angle of Plane | Force P | Weight of Tray W | Normal Force wcos(θ) | Sliding force w sinθ | Force coefficient | Frictional angle |
|---|---|---|---|---|---|---|
| N | N | N | N | |||
| 10 | 1.0 | 3.04 | 2.99 | 0.47 | 0.16 | 9.09 |
| 10 | 3.7 | 13.04 | 12.54 | 1.44 | 0.11 | 6.29 |
| 20 | 1.5 | 3.04 | 2.86 | 0.46 | 0.16 | 9.09 |
| 20 | 7.0 | 13.04 | 12.25 | 2.54 | 0.21 | 11.86 |
| 30 | 1.9 | 3.04 | 2.63 | 0.38 | 0.14 | 7.97 |
| 30 | 7.9 | 13.04 | 11.29 | 1.38 | 0.12 | 6.84 |
Chapter 4 Conclusion and Recommendations
In first part of the experiment static and sliding friction are measured for the surfaces using an object. Any object kept on an inclined plain will tend to slip down , but it will be avoided by the frictional force which will be acting upwards .
Steel
The angle of friction depends on the two surfaces. The calculated angle of friction or static friction coefficient is the property of both surfaces. It must be noted tat the other surface in each pair is stainless steel base.
References
Russell C. Hibbeler (2006). Engineering Mechanics, 11th Edition. Prentice Hall. ISBN 0-13-221509-8.
