Sept. 27, 2012

Physical Science A
Quick Quiz.  Let's see who is studying.
Bellwork:
    1.  What is the acceleration of an object that accelerates from rest to a velocity of 88 m/s in a time of 11     seconds.  If the acceleration of the object were constant, what would the graph of this motion look like?

    2.  If an object falls from a resting position and reaches a speed of 23 m/s just before it strikes the    
    ground, what is the time required for the object to strike the ground(remember that acceleration due to    
    gravity here on Earth is 9.8 m/s2)?

    3.  Describe the shape of a velocity vs. time graph that:
            -shows an object traveling at a constant velocity
            -shows an object traveling with an increasing velocity.

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 Newton's First and Second Law's of Motion

Demo, loop and washer, tablecloth, block and string.  Discuss

Hand out and explain 2nd law problems.

HW: finish Newton's Second Law Problems

Physics

Today we will switch groups.  If you collected data yesterday, you should work on the projectile motion problems today and vice versa.

At 12:45, we will stop.  Everyone should have there calculations set.  I will set out the ramp for the launchers.  Each group will have the opportunity to fire one shot and see if they are on target with their calculations.  The team closest to the target wins. 

At the end of the hour each group should pick up the "Right on Target" paper.  You will work in groups and as a class to determine the range of the water balloon shot from the sling shot.  The group closest to the target wins. 

The sling shot competition will take place on Friday(hopefully).

HW: Everyone should finish their summary question from the lab.  Also, discuss with your groups how to determine the initial velocity of the launcher.