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9-26 Second Law Lab

Last updated almost 3 years ago
16 questions
Note from the author:
Question: How does changing the weight added to a cart affect the acceleration of the cart when pulled with the same force?
Question: How does changing the weight added to a cart affect the acceleration of the cart when pulled with the same force?
1

Pre Lab: The relationship between acceleration and force is

1

Pre Lab: The relationship between acceleration and mass is

1

Pre Lab: The relationship between force and mass is

1
Pre Lab: Mass is best described as ____________________________________ _'Weight is best described as _______________________________________ _
Other Answer Choices:
influenced by gravitational pull
amount of matter in an object
10

Create a hypothesis in proper 'If' 'Then' format based on the question

Procedure: Link to Data Tables
1. Record the mass of the hanger that will be attached to the end of the string
2 Record the mass of the empty cart
3. Pull the cart back so that the hanger is at the top of the pulley.
4.Release the cart and time how long it takes for the cart to reach the end of the table and record in your table.
5.Measure the length the hanger dropped and record in Calculations Table (Hint this will be the same for each trial). Repeat steps 3-5 two more times
6. Add mass to your cart and record the new mass in your table and repeat steps 3-5 three more times.
Follow this procedure for each mass added.

Equations you may need:
v=d/t
a=v/t
F=ma
10

Link to Data Tables Upload a picture of Data Table 1

10

Link to Data Tables Upload a picture of Calculation Table 1

6

Link to Data Tables Upload a picture of Calculation Table 2

10

Upload your graph showing the relationship between Acceleration and Mass.
Make sure your axes are labeled and a proper bestfit line is added.

2

Analysis: What causes the acceleration of the cart?

2

Analysis: As more mass was added, the acceleration of the cart-

2

Analysis: What type of realtionship does your graph illustrate?

2

Analysis: The force of the system-

2

Analysis: What are three sources of error that could have occured?

Write your CER on your first copy of the paper
1st Drafts are due beginning of class 9-29
Final CER Revisions are due 10-4
Use these guidelines for your revision and when giving peer reviews:
C = Claim: Statement about the results of the experiments based on the original purpose. Must relate to your Hypothesis which relates to the Purpose. Full hypothesis omitting the ‘if’ and ‘then’ based on appropriate data that describes the relationship between the dependent and independent variables. Define all terms, variables, concepts, and relationships. Do not include data or conclusions. Explain the lab without including all details of the procedure.
E = Evidence: Evidence/ data/observations that supports the claim. List ALL data that supports your claim. Include 3 ordered pairs that illustrate the trends the graph illustrates; Utilize your answers from the appropriate data tables and lab questions. Include 3 ordered pair data points and appropriate data from the Data Collection and Data Analysis Sections.
Explain the trends in the data without listing reasoning or a conclusion.
R = Reasoning: Use reasoning to link your evidence to your data.
Clearly explain how or why the evidence supports the claim.
justifying the link of the scientific principles of the claim to the evidence.
List at least 3 sources of error only 1 of which can be human source of error.
Utilize your answers from the appropriate post lab questions.
Proof Read!
  • Does this make sense to someone that has not taken this class?
  • Did you clearly illustrate your point?
  • Can your conclusion stand alone and give a clear view of the lab conclusions?
  • No pronouns! Be specific. Alter “it is rolling” to “The ball is rolling”
  • Present tense only! Science is timeless. No past or future tense. “We measured the distance” to “the distance is measured”
  • Do not reference the lab. Reference only the scientific principles. Alter “In the lab” to “the evaluation of.”
  • Shared conclusions will split the grade with all common conclusions.
10

I completed my first draft by 9-29 and two peer reviews by 9-30 and gave helpful feedback using the guidelines to the left.

30

I completed my final revision of my CER by 10-4 using the feedback given and the guidelines to the left.