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.
Forces act on you and everything around you at all times. Any time an object stops moving, starts moving, or changes direction, it does so because a net force is acting on it. Newton's Laws describe how force affects velocity. Most objects experience forces in more than one dimension. The amount of friction determines how much force is needed to move an object.
THIS WEEK (11/16 - 11/23):
This week we will begin to take a look into Newton's 3 Laws of Motion. We will understand how forces cause objects to move or not move at all. We will also look further into Newton's Second Law of Motion and use it to compute the amount of force needed to accelerate an object. We will distinguish between weight and mass, as well as understanding the nature of frictional forces and how they affect the motion of an object. At the end of the week, we will take our first look at Free Body Diagrams (FBD's) and identify all the forces and accelerations associated with them.
NEXT WEEK (11/28 - 12/2):
This week we will continue to study Free Body Diagrams (FBD's). It will be understood that if an object is moving with a constant velocity, the applied force and frictional force are equal but opposite to each other - which will be applied to FBD's. Drawing a diagram to indicate all the forces acting on an object is vital to understanding its motion. We will continue to identify all the forces acting on an object and determine if the object will accelerate, but now we will be analyzing situations where objects have more than one applied force and objects are on an inclined surface.
☻LAB: Hit the Cup Lab: Week of 11/14 - Graded during your lab period
☻QUIZ: Free Body Diagrams 1: THURSDAY 12/1
☻LAB: Frictional Force Lab: Due week of 12/5 on your lab day!