Unit 1, Week 2, Kinematics

Task 1: Yesterday, at the end of class, we started discussing models.  We've used several in this class already.  A model is a piece of information that shares some, but not all, pieces of reality.   For example, a globe of the earth doesn't ACTUALLY have water, or active volcanoes, or wind and weather.   It's designed to let us see where everything is at in relationship to something else.

What do each of these models do with regards to velocity? What aspects of reality do they lack?  Discuss this with your partners in the class and place into your binder.

• ticker tape
• video tape
• d-t graph
• equation associated with the d-t graph
• logger pro information

We'll take a look at the models as we try this work.   It must be completed individually, and there are copies by my desk if you want them.

Task 2:   V-t graphs are another type of model.   If you cut apart the intervals strips on a ticker tape, you can see what is happening to the velocity (the interval/unit time) over a series of time periods.   Yeah, that's a bit confusing.   Basically, you are separating the strips on a ticker time into small sections and then go again.

This would be long and tedious if we always had to do ticker strips, right?











So, there is another way.   We determine the slope of the d-t graph and that becomes the value for the v-t graph.   It all starts with the ticker tapes, but Logger Pro can help us out with the details as we get ready.  Use the logger pro to do the activities suggested here.   For each one, you will need to record in your notebook what the d-t graph looks like, what the v-t graph looks like, and what you think the ticker tape would look like.

Task 3:  We've got to be able to go from one graph to another quickly in our minds.   That's what this task is for, and why you need to complete it individually.   Copies are available by my desk.

Task 4:  Review for next week's quiz.