October 11, 2012
Physical Science A

Bellwork:
    1.  Consider a situation where a person pushes on a car with a force of 2000 N for 85 seconds.  The     car does not move.  How much work and power does the person use?

    2.  In order for work to be done, what must occur?

Objectives:
    1. Compare work done in different situations.  Give two examples of work being done and   
            compare the magnitude of the work in each situation. 

    2. Explain why work has a more precise scientific meaning than the meaning of work in everyday     language.

    3. Calculate the amount of work done on an object that is moved from one position to another.      Use     the formula W=Fd to solve for the work done by an object.

Check and Go over the homework problems.

Muscle up Lab.  Each group will perform five activities where they will calculate the work done and the power used.

HW: Finish the lab questions.  Read section one and two in the book and answer the questions on page 131.  Quiz tomorrow over work and power.

Physics:

Bellwork:

    1.  Answer the force question on the white board

Hand in and discuss the rocket explanation.

Test the predictions:  1/3 water

               1/2 water

               3/4 water

Check and go over the the math problems.

Pick-up a prelab and lets discuss forces and angles.

Discuss Lab method and begin lab today, we will finish lab tomorrow.

HW:2-Dimensional Forces lab(do as much of the lab that you can).  Pick-up the friction and statics problems, if you would like to get started, you could work on the statics problems.  We will begin those tomorrow.