Monday, September 17, 2012

When Net Force Doesn't = 0N


I collected the lab and checked it for completion.  To earn the full score that was written on your paper you MUST correct your lab  with a RED PEN!  I will be collecting the lab again at the next class meeting.  We also corrected Quiz 2.5 (the quiz from the last period), but I postponed the quiz on the lab until the next meeting.

Most of the period was spent discussing what happens when the forces are no longer balanced.  According to Newton's 2nd Law, in the presence of a net force, an object will accelerate.  We then learned how to calculate the acceleration of an object using the sum of the forces equation.  I reminded students that I have given them many different tools throughout the unit.  The tools in your toolbox will allow you to solve the problems, and the order that you use the tools depends on the type of problem you are given.  The tools you have are:

Force Diagrams
ΣF Equations
FEarth on Object = -9.8 N/kg*mass
ΣF = ma

Students worked on Worksheet 3 in class, and most students got a stamp.  If you did not get a stamp you can come in at tutorial to finish it and get a stamp.

We have now learned all of the material for then Forces Unit test.  The test will be on Thursday 9/20 for Orange Periods and Friday 9/21 for Black Periods.

HW:  Review Sheet- Due NEXT TIME; Correct Lab; Quiz on next time on WS 3 and the Lab


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