Today we worked through some projectile motion examples on whiteboards. Homework is problem #5 on the worksheet. You can check you answers on the back side of the worksheet.
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Today we worked together to solve projectile motion problems. Tomorrow we will work more examples on whiteboards.
Today we began talking about 2 dimensional motion. We looked at how we can find distance, displacement, average speed, and average velocity when an object is traveling in 2 dimensions. Homework is p. 82 #1-4, 6, 7, 9. You will be handing these problems in tomorrow.
Today we finished up the online projectile motion simulation lab.
Today we practiced adding vectors. The solutions to the vector packet are in the google drive folder. The solutions to the Trig Review questions are also in the google drive folder. Quiz tomorrow on trig and vectors. Make sure you can find components of vectors, add vectors graphically, and add vectors algebraically (using components).
Finish the vector addition packet if you have not already done so.
Today we learned how to add vectors using components. Please try the first adding vector problem in your packet (#5-1).
Today we learned how to write vectors in polar form (magnitude, angle) and component form (x-component, y-component). We also learned how to change from one form to the other. Homework is problems #4-1 through 4-5 and 6-1 in the packet. We will complete the remaining problems tomorrow when we learn how to add vectors using components.
Yesterday we reviewed some trig concepts that we will be using going forward. Homework is p. 23 #12, 14-16, 18, 20. Number 20 is a challenge problem (HINT: you will need to define 3 variables and write two trig equations. You are looking for the ratio of the two buildings...) Solutions to the problems are in the google drive folder if you want to check your answers.
Today we worked on test corrections for the 1 dimensional kinematics test. You can earn back 1/2 of the points that you missed by doing test corrections. Your corrections must have the following:
- be done on a separate piece of paper (neatly) - analyze your original solution and EXPLAIN what you did wrong IN TERMS OF PHYSICS (see example below) - rework the problem correctly Staple your corrections to the FRONT of your original test and turn in NO LATER THAN the beginning of the period on Monday 10/16. NO LATE WORK WILL BE ACCEPTED! Test Corrections (thanks to tregphysics for the example) Test corrections are more than simply marking the right answer on your paper. You must analyze your solution and write about what you did wrong and how you can fix it while focusing your discussion on the physics of the problem. Here's an example of a poor error analysis: I drew the line on my velocity graph above zero, and I should have drawn it below. The analysis above doesn't actually discuss any physics. It simply states where a line should be drawn. That's not physics! Here's a more thorough analysis... I sketched a positive, constant velocity by drawing the line on my velocity graph above zero. I drew that because I thought that the ball wasn't accelerating. However, the ball is rolling down a ramp while moving to the left. This means that the ball is accelerating and the velocity is changing, not constant, and increasing to the left. Since it's increasing to the left, the line should be drawn as getting more and more negative. The above analysis references both how the line should be drawn on the graph and it discusses the physics of the situation. If you're not sure whether or not you've done a thorough enough job, then just ask me, and I'll happily help out. |
Reminders:
10/16/2018 - Test on one dimensional kinematics (tentative)
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