Sunday, October 17, 2010
Fri-Day 2
Physics - did a projectile motion demo with our infamous spud-gun :)
We saw that the MINIMUM data that needs to be collected in order to determine the initial launch velocity (and angle, even though we set the angle to 60 degrees in this demo) is the RANGE, horizontal distance, and the TIME of flight. We assumed a flight time of 1.20 seconds, but next time we'll get an average time and range from three or more trials.
We then worked on projectile motion 2 question 3, which shows us how the range of a projectile varies with launch angle. The range increases with increasing launch angle UP TO 45 degrees, but then the launch angle decreases proportionally until the projectile is fired straight upwards, at 90 degrees, so the horizontal range goes back to zero meters.
Check Blackboard for the assigned HW, which I will check on Monday morning:
Finish Projectile Motion 2, question 3c (I'll post the answers with work show to question 3a, which we almost finished in class, and to 3b and 4, as a reference for you.
Then do Projectile Motion 3, question 5; (I'll post the answer to question 4)
Projectile Motion 4, questions 1 and 2 (we already did question 3)
Projectile Motion 5, questions 1, 2, and 4.( I'll post the answer to question 5, we already did question 6, the same as Motion 4, question 3) .
AP Chem - took our Stoichiometry/Solutions exam- 150 points. Clearly, most of you prepared more for this test, and seemed to report that this test was "easier", though from an information-required perspective, this test was more challenging.
We saw that the MINIMUM data that needs to be collected in order to determine the initial launch velocity (and angle, even though we set the angle to 60 degrees in this demo) is the RANGE, horizontal distance, and the TIME of flight. We assumed a flight time of 1.20 seconds, but next time we'll get an average time and range from three or more trials.
We then worked on projectile motion 2 question 3, which shows us how the range of a projectile varies with launch angle. The range increases with increasing launch angle UP TO 45 degrees, but then the launch angle decreases proportionally until the projectile is fired straight upwards, at 90 degrees, so the horizontal range goes back to zero meters.
Check Blackboard for the assigned HW, which I will check on Monday morning:
Finish Projectile Motion 2, question 3c (I'll post the answers with work show to question 3a, which we almost finished in class, and to 3b and 4, as a reference for you.
Then do Projectile Motion 3, question 5; (I'll post the answer to question 4)
Projectile Motion 4, questions 1 and 2 (we already did question 3)
Projectile Motion 5, questions 1, 2, and 4.( I'll post the answer to question 5, we already did question 6, the same as Motion 4, question 3) .
AP Chem - took our Stoichiometry/Solutions exam- 150 points. Clearly, most of you prepared more for this test, and seemed to report that this test was "easier", though from an information-required perspective, this test was more challenging.
# posted by C @ 10:18 AM 
