9/24/09

Projectiles a'Flyin'

Physics F conducted their horizontal projectile lab with, like G block, very good results. By measuring table height (Δy), time could be calculated and used to determine horizontal displacement (Δx). The photogates were very precise delivering initial velocity values and groups were able to predict with admirable accuracy the impact point of their ball bearing. For the extension, graphing launch velocity versus launch position would allow you to set the launch point to hit any target. We will discuss the lab in more detail tomorrow and use this to lead us further into our discussion of projectile motion.

Physics G went over their labs and had good ideas about what real-world situations qualify as horizontal projectiles. We had time to go over Practice 3A and will work on Practice 3B tomorrow. Remember to have your tests corrected by Tuesday if you are opt to improve your score. Full, worked out/explained answers are required and you may use any and all resources to assist you (even me).

We took time in Honors Physics to go over the Chapter Review problems and will continue to do so tomorrow. As folks seem like they could use a bit more practice with these, I'll have some additional problems to work on tomorrow. As for the exam, we will finish up the material early next week and the test could be Wednesday or Friday (Thursday is lab day). If you opt for Friday, we will start Chapter 4 on Wednesday. Think about this tonight and be ready to vote tomorrow.

Physical Science B was introduced to the nature of forces today and began to discuss a specific force - friction. We will cover forces in depth in the next chapter, but this chapter tosses forces into the mix to answer a question many people ask - What causes acceleration? We will review the basic concept of forces tomorrow and go into more depth about friction, specifically. Physical Science E discussed circular motion and the acceleration and force that are responsible for circular motion - centripetal acceleration and centripetal force. We will mention these again when we talk about gravity and orbits. Tomorrow, your lab will let you investigate air resistance and sliding friction and how they impact the motion of objects. Read over the lab sheet tonight so that you are ready for the procedure tomorrow.

Homework

Honors Physics: Look over Chapter Review problems and work on making corrections
Physical Science B: None
Physical Science E: Read lab protocol
Physics F: Complete lab write up
Physics G: Begin working on test corrections (if desired)

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