If for any reason you will be absent from class and know in advance, please notify me by email so that I can ensure you receive the work that you need in order to stay with the class.
TOP 5 FACTS:
PHYSICS OF TIME
First in time
The Egyptians were the first culture to become interested in timekeeping, building giant obelisks in 3500BC to act as giant sundials.
In 8BC the Roman senate gave ruling emperor August Caesar his own month (August, if that wasn’t obvious…) and added an extra day to match his great uncle Julius Caesar’s month (yep, July!) on 31 days.
Throughout World War II citizens in the United States kept their clocks one hour ahead of standard time to allow for longer working hours during daylight.
The world’s smallest atomic clock, built by the National Institute for Standards and Technology, is the size of a grain of rice and accurate to one second in 3,000 years.
In May 2011 Samoa decided to move its clocks forward by one day to allow easier trade with Australia and New Zealand, after spending 119 years almost a day behind.
Vectors are important because they are the mathematical way to represent relationships involving position, velocity and acceleration of moving objects. If you want to model "real life" you need to work in three dimensions, and vectors take care of that. Knowledge of vectors is important because many quantities used in physics are vectors. If you try to add together vector quantities without taking into account their direction you'll get results that are incorrect.
THIS WEEK (10/24 - 10/28):
This week we will begin to look at vectors. We will understand that the order of vector placement does not affect the sum, and how to graphically draw vectors utilizing degrees and direction. We will see how vectors are a graphical representation of motion - we will find the resultant vector when given the x and y components as well as finding the x and y components from a resultant vector. We will also explore boat problems and understand how current affects the motion of a boat when traveling upstream or downstream
NEXT WEEK (10/31 - 11/4):
WThis week we will begin to look at projectile motion. We will recognize that the vertical and horizontal motions of a projectile are independent of each other. We will relate the height, time in the air, and initial vertical velocity of a projectile using its vertical motion, and then determine the range using the horizontal motion. We will see how the range of a projectile depends upon the acceleration due to gravity and upon both components of the initial velocity. The path a projectile takes, or its trajectory, is a curved path in the shape of a parabola.
☻LAB: Acceleration Lab 2: Due The week of 10/24 on your lab day! (except period 3)
☻TEST: VECTORS: Week of 10/31 DURING YOUR LAB PERIOD!
☻QUIZ: PROJECTILES: THURSDAY 11/3
☻TEST: PROJECTILES: WEDNESDAY 11/9