Sept. 26, 2012

Physical Science A
Bellwork:
    1.  Draw the following graphs of velocity vs. time:
            a.  increasing velocity, constant acceleration
            b.  Decreasing velocity, constant acceleration
            c.  Constant velocity

    2.  Explain how to determine the total distance traveled using a velocity time graph.

    3.  A rocket takes off from the launch pad and reaches a velocity of 540 m/s in a time of 15 seconds.     
        What is the acceleration of the rocket?

    4.  Using your idea and understanding of acceleration, explain a possible reason as to why people may    
         get sea sick on boats?

Objectives:
    1.  List and describe the typical force that you experience and interact with on a daily basis.

    2.  Draw vector diagrams (arrows with magnitudes) that Identifies the magnitude and direction of
         everyday forces (e.g.,     wind, tension in ropes, pushes and pulls, weight).

Go over the homework.  Discuss any issues with the velocity vs. time graphs.

Begin discussing forces.

HW: Free body diagrams.


Physics
Bellwork:
    1.  For the following initial velocities calculate the x and y components (horizontal and vertical):

            a.  40 m/s at angle of 23 degrees to the vertical
   
            b.  1500 m/s at an angle of 50 degrees to the vertical

            c.  500 m/s at an angle of 75 degrees to the vertical


Check and go over the prelab.

Discuss the method of the lab.  Half the class will work on the projectile motion problems and the other half will work on the lab.  Tomorrow the groups will switch.

Lab Groups: Work on the projectile motion lab.  The first part of lab is asking you to derive the formulas that you will need to finish the lab.  These formulas are your standard formulas that you have been working with up to this point, only now we are applying the variables that specific to what we need to do.

Secondly, you will use your formulas to calculate the initial velocities and eventually the range of the projectiles.  Once you have obtained your launcher, be careful, if you shoot yourself, IT HURTS! 

Problem Groups: We will go back over projectile motion.  Discuss the formulas.  Go over a few mathematical examples.  Begin working on the problems from the packet.  Utilize this time with a smaller group to ask questions and discuss problem areas.