ACTIVITY:

• Mr. Tackett will be out today.  Review Presentation 2.1.1 Centroids and discuss how we measure the geometric center of a shape.

• Complete Activity 2.1.1 Centroids, and complete problems 1-3 under the heading "Calculate and Label the Centroid Location" in Activity 2.1.1.

HW:

ACTIVITY:

• Shortened period due to NJSLA Science testing

• 2.1.2 Presentation and Discussion the meaning of I and E and discuss how to find those values in a sample 2x4 beam.

  • Find Modulus of Elasticity for a sample 2x4 board by measuring student deflection in plank and beam orientation.

• Go to Classroom and begin Activity 2.1.2 Beam Deflection.  You will use the beam deflection equations to find your weight.

  • Students will pair up and use the process to calculate the Mod of E for the 2x4 beam to calculate their weight.

HW:

• Complete Section 3 Practice Problems in the table and conclusion questions then submit to classroom.

ACTIVITY:

• Finish Beam Deflection activity - a few groups still need to take their measurements, then finish sample calculations.

• If time...begin 2.1.3 Presentation and Discussion of Free Body Diagrams.

• Activity 2.1.3 Free Body Diagrams 

  • Review presentation on creating Free Body Diagrams (FBD) and practice examples in presentation.

• Complete procedures 2-4 and conclusion questions.  Review answers as a class.

HW:

• Complete any work that was not finished in class today and submit to Google Classroom when finished. 

ACTIVITY:

• Activity 2.1.3 Free Body Diagrams 

  • Review presentation on creating Free Body Diagrams (FBD) and practice examples in presentation.

• Complete procedures 2-4 and conclusion questions.  Review answers as a class.

ACTIVITY:

• Review Activity 2.1.4 Calculating Force Vectors presentation together as a class.  Then log in to your PLTW account and complete questions in Activity 2.1.4 Calculating Force Vectors

  • Complete questions 1-15 and conclusion questions.  You MUST show your work for credit.

• Discuss Activity 2.1.5 Moments presentation together as a class.  This activity is a little short.  Do the calculations and model the moments with a ruler if you would like.

  • Complete Activity 2.1.5 Moments in your PLTW account.

• Review Truss forces through PLTW Truss Presentation 

  • Review truss calculation and complete simple example as class

• Begin Step by Step truss calculation in Activity 2.1.6 as a class.

  • Start with step 1 by drawing the entire truss system as a free body diagram and labeling all the known and unknown forces, angles, and distances.

HW:

• Finish the value of force on member CE in Activity 2.1.6

• Finish Activity 2.1.6 Step by Step Truss Calculation.

• Do sample Truss Calculation in Activity 2.1.7

ACTIVITY:

• Review Truss forces through PLTW Truss Presentation 

  • Review truss calculation and complete simple example as class

• Begin Step by Step truss calculation in Activity 2.1.6 as a class.

  • Start with step 1 by drawing the entire truss system as a free body diagram and labeling all the known and unknown forces, angles, and distances.

• Complete ALL of Activity 2.1.7 Calculating Truss Forces.  Use MD Solids to do parts 4 and 5, providing the same explanation as you did above in Activity 2.1.6.

HW:

• Finish Activity 2.1.7 Calculating Truss Forces and turn in to Google Classroom.

ACTIVITY:

• Conduct testing of both of your trusses. 

  • Before testing your truss, find its weight on the scale. 

  • As you are testing your trusses, have a partner record your truss as you apply the force until the truss breaks.  Save this video for your report.

• Complete final truss report in a Google Slides, and submit to classroom with the following included items:

  • • Title of your Truss (make it a good one...but appropriate, of course)

    • Screenshots of your truss design showing angles and tension/compression forces, obtained from MD Solids.

    • Efficiency calculations Force/Weight for each truss.  Compare your results in a chart with the entire class.

    • Take a photo of your truss after it has broken by laying it out on the desk showing where your truss broke. 

    • Insert the video you took of your test.  Be sure to change the share settings of the video so "anyone with the link can view".

    • Screen shot of the graph showing the max force at break point.

    • Answer the conclusion questions below:

      • Reflect on your design and test.  How could you improve the design based on your data and testing observations. 

      • Explain why you think failure occurred at the truss member where it did. Did your truss fail at the member that your calculations revealed as undergoing the most stress?

    • Reports should be created in a single Slides Presentation and turned in to Classroom tonight.

HW:

• FINAL EXAM REVIEW

  • Go to my Final Exam Review Page where you will find several review documents and practice questions to help you prepare for the Final Exam.

  • I suggest you review the pdf documents that summarize each of the 4 units first, then complete the unit practice sheets in sequence.  Complete all answers in your engineering notebooks.

  •  These should be completed by Friday so we can review any questions you have before the exam.

ACTIVITY:

• Review answers to Activity 2.3.1 questions 6-10.

• Complete Activity 2.3.2 Tensile Testing Activity. 

  • Complete tensile test on all 4 samples.  Take screen shots of each test for the Steel, Aluminum, and Copper samples.  Paste the screen shot in the box for questions 1-4 and complete the calculation for each sample.

  • When you are finished, submit to Google Classroom.

• Quiz on Stress and Strain

HW:

ACTIVITY:

•  Periods 3 and 4 Exam Review Day

HW:

• Study for Final Exam

• Last day of school for teachers

• Graduation tonight