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🟢 8: Th 11/20 - 📓 static equilibrium lab
🟢 8: Th 11/20 - 📓 static equilibrium lab
Today, we'll look at "static equilibrium" problems - where the forces are balanced. We approach static equilibrium problems by making ΣFx=0 and ΣFy=0, but some of the forces will be at angles.
Homework: Quiz on friction, static equilibrium & 2-D vector forces next class - Friday, November 21st Tuesday, December 2nd.
IMPORTANT !! Complete this mandatory 3 minute survey by 10 pm. It is fully anonymous and will be used to help evaluate Mr. Solorio's teachings to help him grow.
We'll start by learning about a problem that rock climbers encounter when building an anchor. We'll learn the physics theory and engineering behind climbing safety. In order to fully understand the problem, we'll look at how Newton's Second Law acts in two dimensions with a physical model of the situation. We'll investigate how the angles at which the slings hang can impact the amount of force they experience and can support. We'll perform a lab where we try to find the mass of a mystery object using two dimensional forces. First, to get an introduction, we'll watch this video 0:27-2:12.
You will set up three asymmetrical situation with the Y-tension string. Assume the string is ideal (massless and inelastic). Use a protractor to measure the angle of each string with the horizontal. Use the spring scales to measure the tension in each string.
In your Y-Tension Lab Handout, draw a free body diagrams of the knot. Record the angles and tensions for each of the three situations at your lab table. Calculate the mass of the mystery object. Mass the mystery object on the digital balance, and do a percent error calculation.
If you have any trouble understanding the calculations for the lab, check out the following video. The strategy is to draw a free body diagram of the knot. (If the knot is made out of ideal or massless string, it does not have a force of gravity on it.)
Lab Handout: Y-Tension Lab Handout
Homework: If you'd like to get ahead, check out the 📖 textbook problems in the next post. Quiz on friction and static equilibrium & 2-D vector forces next class - Friday, November 21st Tuesday, December 2nd.
🟩❗8: F 11/21 - 📖 2-D dynamics problems
🟩❗8: F 11/21 - 📖 2-D dynamics problems
Lab Quiz on static equilibrium & 2-D vector forces TODAY.
Before the quiz, we'll have an opportunity to practice some 2-D dynamics problems. This is the perfect opportunity to ask questions before the assessment.
Homework: Please make sure to finish analyzing your data in your individual Google Sheet and fill out the Google Form. This needs to be completed if you are to perform the next part of the lab next class.
Optional Extra Practice: 📖 textbook chapter 5 #1-4, 7, 10, 34, 75 also available in Mastering Physics so you can check your answers.
💚 8: M 11/24 - inclined planes
💚 8: M 11/24 - inclined planes
Mr. Solorio's last day 😩
Today, we’ll look at how we can apply what we know about vectors in two dimensions to inclined plane problems. The key to inclined plane problems is picking a coordinate system that makes sense. We must shift our thinking from a traditional horizontal-vertical coordinate system to a slanted coordinate system. We'll talk about what factors affect the motion of an object on an inclined plane theoretically and in real life.
If you missed today's lesson or you need to review some, watch the following video.
Homework: Review your notes and come up with a strategy for the lab that was introduced today. Know how you will perform an experiment to find the coefficient of static friction on an inclined plane. Quiz on friction and static equilibrium & 2-D vector forces Tuesday, December 2nd.
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