Gravity is a weird thing

http://www.bbc.co.uk/news/science-environment-12911806

Bridge Reflection

Reflection on Bridge Building

Test your bridge, and measure the mass in kg that it holds.

Send a picture or video to marciarpowellATgmailDOTcom  List your group members.

Watch the video

Answer the following

1. How much did your bridge hold?
2. How much did it cost, and how did you minimize your costs?
3. What is the mass of your bridge?  Convert to kg.
4. Calculate the force weight of the bridge, and the force weight of the load applied.
5. Calulate a ratio to show me the strength of the bridge (load/bridge)
6. Using the member data sheet, which bridge member held the greatest load? How do you know?
7. Can a member experience both compression and tension? Explain.
8. IS your bridge model a good fit for the bridge you made in the program? Why or why not?
9. Draw a force diagram for your bridge when the truck is on the left-hand side of the structure.
10. How does friction matter in this project?
11. What have you learned in this project about statics, force diagrams, angles, and vectors.

This entire sheet should be 1-2 pages long, hand-written or typed

Google Earth

You are headed on a dream vacation! Start at Manchester, and zoom around the globe using Google Earth in the North Lab. At least one place must be south of the equator, and place east of London. As you travel (on at least ten stops), keep track of the latitude and longitude for each place, and the vector heading from point to point


Day 2:
Create a scrapbook of activities and interesting highlights (You can print photos, and please write down 2 or 3 observations for each place. Ask other classmates who scrapbook for ideas...

Note the length and the angle of each leg of your trip. You must resolve this into component vectors using a diagram and trig functions.

NOTE: You can take a partner on your trip, but the reflection must be done individually.

REFLECTION QUESTIONS

• When you are finished, determine the net displacement from Manchester to your last location. Include a vector heading. Compare this to the value created by your component vectors. DO THEY MATCH? WHY or WHY NOT? (I will show you how to do this on Day 3)

• Reflection questions that must be answered INDIVIDUALLY on the back of one of the graph sheets.

a) Would Google Earth or the component vector method be better for pilots?
b) Based on the component vectors and the curvature of the earth, could we easily determine a scale where 1cm = _____ miles. Why or why not?
c) How does a GPS use vector determinations as it calculates location? Did this give you any unexpected results? Explain.
d) Give three examples where a vector must be exact to the nearest mm.
e) Give three examples where a vector must be exact to the nearest m.
f) Give three examples where a vector must be exact to the nearest km.
g) Given what you have learned about vectors, when are scale drawings useful? When should you switch from a paper map to a digital device?

h) What did you learn during this project?

Vector Assignment

Do FOUR of the following to pass

Do SIX of the following to get an A for this assignment.

For each problem, draw a diagram, and find the information shown.  List  the needed trig function.

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1.  Joyce walks 3 miles E and 4 miles South.   What is her hypoteneuse?  What is the angle?


2.  Curt swims across a wave pool at 2 m/s,  The cross current is at a perpendicular to him at a speed of 1/2 m/s.   Which way will the water take him?  Show an angle and a resulting speed.


3.  An airplane is traveling 300 mi/hr west, and a cross wind is bearing down at 30 mi/hr south.  What angle and resultant speed will result?

4.  Gary pushes down on a lawnmower handle with a speed of 1 m/s, directed at a 45 degree angle.   What is the effective forward speed?


5.  If a soccer player kicks a ball with a speed of 12 m/s at an angle of 140 degrees, what is the east and south component?

6. A golf course hole is 300 yds long, and oriented at a heading of 190 degrees.  What are the south and western components?

7. If a car drives at 55 mi/hr perfectly SW, what is the southern component?  What is the northern component?

8.  A bicyclist travels 30 miles west and 40 miles north.  How far is she from her starting point?  What is her angle of orientation?

Vector Golf

Step 1: You, along with one other designer , will be putting together a 9-hole golf course. The maximum area available for the golf course is a land area that is 1760 yds by 1760 yds (you do not need to use all the land). A lovely creek (not a river) runs through the land, and there are trees on two edges, and a housing development on a third. You will need to have PAR information to do this, but these values are approximate, so you do have some leeway.

For the purpose of this activity, cost is no object, so trees and sand traps can be added at will.

Establish a scale: __________ yards = 1 cm   

Orange:  5 cm = 10 yds

Blue:  10 cm = 15 yds

Yellow:  10 cm = 20 yds

Draw a detailed sketch of your course using the paper by the meter sticks and hand in. Make sure you have added a compass rose and have marked the scale on your paper. Color the course using colored pencils or crayons.

Provide a vector length and heading for the first leg of each hole (We will do this on Monday).

Hints: Club houses are often 6000-15000 sq. ft. Houses are often 1800-4000 sq. ft., with the upper range representing a mansion-style home.If you choose to make a mini-golf course, you have an area that is 100 yds by 500 yds, and must include a clubhouse, a parking lot, 9 holes of golf, and a snack shop On one side of the course must be a go-kart course.

Hint: Google 'golf course design' if you need a sample to get ideas.



Step 2 :
Each person in your group will make a scale drawing of one hole, using a scale of 3 cm = 120 yards, in Power Point. The scale drawing will be done digitally using Power Point, but three copies of the hole must be handed in. Label the drawing with a hole number, mark the tee with a T, and the hole in a flag. Make sure the compass rose on this drawing matches the orientation of the hole on t he master course. The master course must also be handed in.