weaks4_4

= Weaks Period 4 =

**Team Pi-Rho **
David Moreno(Pistolero) FoRrEsT Elbeck ......Oh yea and JUSTIN MEJIA

Follow the directions on the Vertical Motion page, to complete each of the sections below.
==== __**The Word Problem:** How you solve for time in the problem your group was assigned? Prepare the equation to solve for time, defining the variables and supporting your choice in equation __ ==== == 1) You are standing on a bridge over a creek holding a stone 20 feet above the water. You throw the stone upward with an initial velocity of 30 feet per second. How long will it take for the stone to reach the water? ==



** h=Height **
The formula we are using is

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= =  = The number 2180 tell us that there are 2 real solutions(roots). What we did was use the discriminant of the quadratic formula to find how many solutions there are in the graph. =

 **__The arabola:__**  Use what you know about parabolas to predict the shape of the graph. What will it look like, and how do you know?  A: -16  "A" determines whether the vertex of the parabola is a maximum (opens down) or minimum (opens up).  B: 30  "B" determines the position of the parabola of the x-intercept.  C: 20  "C" is the y-intercept.  <span style="color: #ff00ff; font-family: Impact,Charcoal,sans-serif;">In the equation below, the vertex of its parabola will be maximum because "a" is negative. The parabola will cross the y-axis on (0,20). <span style="color: #124007; font-family: 'Times New Roman',Times,serif; font-size: 120%;"> = =

<span style="color: #540808; font-family: 'Arial Black',Gadget,sans-serif;">**__The Math__:** <span style="color: #540808; font-family: Impact,Charcoal,sans-serif;"> The best way to solve for x or the solutions is by using the quadratic formula. We think this because when we tried the other ways, they couldn't be completed. The quadratic formula is simple and not hard to do.

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the starting velocity of the rock. The y-intercept represent the initial height you are throwing the rock from. The roots represents the amount of time it takes to hit the ground. The rock is in the air 2.39 seconds. We know this by using the quadratic formula & the graph.======

<span style="color: #540808; font-family: 'Arial Black',Gadget,sans-serif;"> ====<span style="color: #540808; font-family: 'Arial Black',Gadget,sans-serif;">**__Reflection__** David: The thing I found most difficult finding the graph because the axis of symmetry, vertex, roots, and graphing were hard. There was alot of work and numbers to work with. What I would do better is to work harder because we didn't have a lot of time because we missed a day.==== ====Justin: The thing I found most difficult was the graph because we needed to find the y-intercept, roots, axis of symmetry, and vertex. The thing I would do next time is to work harder. I now know the Quadratic formula better. I now understand the difficulties of being a teacher.==== ====Forrest: One thing on the project I found difficult to do was to do a lot of the work on Thuursday and Friday. This was hard because our was gone on Wednesday for a field trip. I would choose better group members to work with. The problem didn't help me understand the quadratic formula & vertical motion better. It felt good to pretend to be a teacher.====