Lab template Friction

/in /by

(1 point)
Title of the Experiment:
Student’s name:
Section SLN:
TA’s Name:
Week of the experiment:

Delete all the comments in red before you submit lab report.

1

Objectives: (3 points)

Experimental Data (3 points): Insert experimental graphs and obtain from the graphs all the
experimental data that will be used for further calculations in Data Analysis.

PART 1. Static Friction
1a) Cart on the horizontal track
State all values with appropriate units
Mass of the cart, M =
Mass of the hanger, m =
Mass on the hanger, mw=
Total mass of the hanger mh =

1b) Cart on an inclined plane

 State all values with appropriate units 

         Mass of the cart, M  =

Trial
Critical angle (Θ)

2

PART 2. Kinetic friction
2a) Cart on the horizontal track

 State all values with appropriate units 
         Mass of the cart, M  =  
         Mass of the hanger, m =

Run
acceleration, a

2b) Cart on an Incline plane.

 State all values with appropriate units 

         Mass of the cart, M  =

Run
acceleration, a

Data Analysis (10 points):

PART 1. Static Friction

1a) Cart on the horizontal track.

❖

The experimental value of the coefficient of the static friction µs calculated as

follows:

3

(Show equation and calculation)

❖ The discrepancy between the experimentally determined µs and its actual given value has
been calculated to be:
(Show equation and calculation)

1b) Cart on an Incline plane

❖ The experimental value of the coefficient of static friction µs is calculated with equation
(4) as follows:
(Show equation and calculation)

❖ Determine the discrepancy between the above-calculated value and the given one to
compare them: 100%* (|calc. value– expect. value| / expect. value).
(Show equation and calculation)

PART 2. Kinetic friction
2a) Cart on the horizontal track
❖
For run 1 the coefficient of kinetic friction μk is calculated as follows:
(Show equation and calculation)

❖
For run 2 the coefficient of kinetic friction μk is calculated as follows:
(Show equation and calculation)

❖
The average values of coefficient of kinetic friction μk from both runs is:
(Show equation and calculation)
4

❖
The discrepancy between the experimental and theoretical values is:
(Show equation and calculation)

2b) Cart on an Incline plane.

❖
For run 1 the coefficient of kinetic friction μk is calculated as follows:
(Show equation and calculation)

❖
For run 2 the coefficient of kinetic friction μk is calculated as follows:
(Show equation and calculation)

❖
The average values of coefficient of kinetic friction μk from both runs is:
(Show equation and calculation)

❖
The discrepancy between the experimental and theoretical values is:
(Show equation and calculation)

Results (3 points)
State all values in the table with the correct number of significant figures and appropriate
units!

5

Discussion and Conclusion (10 points):

(Follow the general directions given in the Syllabus where it is describing how the Discussion
and Conclusion section should be composed. In particular explain how the values of the
coefficients of the kinetic and static friction compare to each other; what does the frictional force
depend on, explain the nature of the frictional forces, also explain the reasons for discrepancies
between your experimental and theoretical results).

6