EGB113 Energy in Engineering Systems S1 2021 MT1A CONSERVATION OF ENERGY Before starting this report, go to the EGB113 BB site under "Learning Resources - Laboratory Work" then: Read through the MT1A lab manual instructions

Subject:PhysicsPrice:19.99 Bought19

Share With

EGB113 Energy in Engineering Systems S1 2021

MT1A CONSERVATION OF ENERGY

Before starting this report, go to the EGB113 BB site under "Learning Resources - Laboratory Work" then:

1. Read through the MT1A lab manual instructions.
2. View the MT1A Lab demonstration video.
3. Download the MT1A experimental observations for your report.
4. Complete this proforma.
5. Save this file as pdf and upload to the BB Turnitin link by the due date.

Marking Criteria:

Criteria	Standards	Marks
Recorded data	Data entered clearly in tables (or appropriate spaces) to a reasonable number of significant figures Recorded data includes appropriate units row/column headings and units	/2
Interpretation of Graphs and Graph data	Interpretation of graph data for calculations Correct FBD with forces labelled appropriately Correct time interval identified	/4
Data Analysis	Well set out calculations showing data obtained from measurements substituted clearly into formulae Correct analysis of data to obtain results	/8
Conceptual Understanding	Your answers to any questions asked are plausible within the context of the experiment Answers to questions demonstrate understanding of connection between obtained data and the physical concepts described in the laboratory manual instructions and demonstrated in provided video	/6
	TOTAL	/20 ≡  /10

 

 

 

MT1A CONSERVATION OF ENERGY

Interpretation of Graphs and Graph data

Determine the value of the spring constant from Graph 1 in the appendix:

Answer: k = enter k value  (  enter units in brackets   )

 

Determine the compression of the spring from the change in position of the cart+block in Graph 1 in the appendix:

Answer: x = enter x value  (  enter units in brackets   )

 

How would you use Graph 2 in the Appendix to determine the force of kinetic friction? Over what time interval would you select data points? NOTE: Do not use this graph to calculate the force - your data is provided in Tables 1 and 2.

Answer:

 

Draw a free body diagram of the forces acting on the block+cart as a singular mass when they are pushed by the cart with the force sensor over this time interval.

Answer:

 

 

 

Data Analysis

Using the data from the appendix, show ONE sample calculation for the normal force of the cart+block on the horizontal track.

Answer:

 

Using the data from the appendix, show ONE sample calculation for the coefficient of kinetic friction between the felt and the track.

Answer:

 

In the table below, enter the corresponding data given in the appendix. Also enter your calculated answers for the normal force and coefficient of kinetic friction for each trial to an appropriate number of significant figures.

Felt Trial	Mass Cart+Block+Added Mass (       )	Applied Force                (      )	Normal Force        (       )	Felt   μk
1
2
3
4

 

Average m_k for felt = ____________

 

 

In the table below enter the corresponding data given in the appendix. Also enter your calculated answers for the normal force and coefficient of kinetic friction for each trial to an appropriate number of significant figures.

Cork Trial	Mass Cart+Block+Added Mass (       )	Applied Force                (      )	Normal Force        (       )	Cork   μk
1
2
3
4

 

Average m_k for cork = ____________

In the tables below enter the data given in Tables 4 and 5 of the experimental observations in the appendix. Also enter your calculated answers for measured distance for each trial to an appropriate number of significant figures.

Felt Trial	Initial Position (      )	Final Position (      )	Distance (      )
1
2
3

 

Cork Trial	Initial Position (      )	Final Position (      )	Distance (      )
1
2
3

 

 

 

Using Equation 10 from the MT1A laboratory manual and the data from your previous tables, show calculations for the theoretical displacement of the cart+block for both felt and cork.

Answer:

 

In the table below enter the average measured distances and theoretical calculated displacements to an appropriate number of significant figures. Also enter your calculated answers for percentage difference between the measured and theoretical values, noting the sign (+ or -) in each case, where

% Difference= Measured-TheoreticalTheoretical×100%

Material	Average Measured Distance (      )	Theoretical Displacement   (      )	% Difference
Felt
Cork

 

Discussion

Compare the coefficient of kinetic friction values you obtained for felt and cork. Which one would be expected to have the higher coefficient value? Do your results agree with this?

Answer:

 

 

 

Compare your distance measurements to the theoretical values you calculated. Suggest some likely causes of any differences from the theoretical values that may have arisen.

Answer:

 

With the coefficient of kinetic friction values calculated for the felt and the cork, at what angle would the block velocity be constant on each surface with no applied forces? Show calculations for each.

Answer:

 

 

 

Appendix – Group 1

Table 1 – Determination of the coefficient of kinetic friction for felt on metal

Felt Trial	Mass Cart+Block (kg)	Mass Added Mass (kg)	Applied Force (N)
1	0.318	0	0.882
2	0.318	0	0.803
3	0.318	0.500	2.053
4	0.318	0.500	2.031

 

Table 2 – Determination of the coefficient of kinetic friction for cork on metal

Cork Trial	Mass Cart+Block (kg)	Mass Added Mass (kg)	Applied Force (N)
1	0.318	0	1.519
2	0.318	0	1.582
3	0.318	0.500	3.992
4	0.318	0.500	4.018

 

Table 3 – Ramp angle

Material	( ° )
Felt	10
Cork	15

 

Table 4 – Measured displacement of cart + felt block

Felt Trial	Initial position (m)	Final position (m)
1	1.01	0.76
2	1.01	0.78
3	1.01	0.81

 

Table 5 – Measured displacement of cart + cork block

Cork Trial	Initial position (m)	Final position (m)
1	1.01	0.92
2	1.01	0.90
3	1.01	0.88

 

 

 

 

Graph 1

Graph 2