Sept. 14, 2012
Physical Science A
Bellwork:
    1.  How fast is a plane traveling if it is flying with a velocity of 340 km/hr into a head-wind of 20 km/hr?
    2.  A swimmer trains by swimming up a river and down the river.  If he swims with an average speed of
         8 km/hr and the river is moving at 5 km/hr, how fast does the swimmer appear to be traveling in both         directions.
    3.  Why do airports have an express walkway (really long moving treadmill)?
    4.  Explain the difference between
                    A.  Scalar and Vector
                    B.  Total distance traveled and displacement
                    C.  Speed and Velocity

Goals:
    -Be able to describe the motion of an object give a distance vs. time graph.
    -Be able to calculate the speed/velocity of an object for given values.

Collect and Go over the lab.

Discuss motion, speed, velocity, and graphing.

Demonstration:
    -Graphing the motion of an object.
    -Make prediction that will produce the given graphs.

Discuss how to solve the speed and velocity problems.  Go over an example.

HW: Finish the speed and velocity problems.


Physics
Discuss acceleration, Gravity, and Free Fall.

Demo: Falling objects.

Pick up a sheet on graphing.  Attempt to show a generalized graph of the motions in the data table.  Use pencil just in case you have to change an answer.  We will discuss the answers as a class.

Continue Lab on Motion and Graphing.  If you were having trouble doing the initial motion predictions and results, make sure you get my help if you need it.  These are the predictions and results use the motion detector and the white boards for part II.  Don't forget to get my initials at the end of page 8. 

For part three, make sure the setup allows you to accurately measure the motion of the cart.  If you are having trouble with the cart, attach a card to it!  The acceleration graphs will be a little tricky to see and derive, don't worry about those.  Take a guess but do not spend a ton of time trying to figure them out.  Answer the questions and then get my initials on the bottom of page 11.

HW:  If you have not finished the graphing motion lab, please finish the lab.  Secondly, please do the problems on free fall.  I will check and go over these on monday.