cahier physique - physics workbook

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ADDING VECTORS: FILL THE BLANKS FOR FULL CREDITS
THe idea of this activity b is for you to understand that the order of vector addition does not matter.
vector1 + vector2 = _________________

First let's go over the anatomy of a vector:

You add vector you attach them tail to head. The vector sum is the arrow that connects the tail of the first vector to the head of the last vector vector. Consider C the vector sum of A + B:

step1: draw A and B tail to head

step2: draw the vector sum C by connecting the tail of A to the head of B

1) Your turn: Draw the vector sum for each of this case:

2) You go 3 block @ east, 5 block @north, 3 blocks @ west
final displacement = _________ @ ________
if instead you go 5 block @north, 3 blocks @ west , 3 block @ east then final displacement = _______ @ _________
if instead you go 3 block @ east, 3 blocks @ west, 5 block @north then final displacement = _______ @ _________

So does te order matter when adding vector ?

TREASURE HUNTING

It warn't too long ago that Pirate Pythagoras sailed the seas around Glesburg. An evil scoundrel he was, killin'and plunderin'as he pleased.

Now, Pirate Pytag, as he was called by his crew, took a liking to vector addition after reading a plundered physics book. He often gave his orders in vector form and often sent prisoners to their watery graves with the command, "walk 10 paces west, off the plank!"

It was by the light of the moon during a calm evening in late October that Pirate Pytha discovered an important rule for vector addition. He wrote the rule on a piece of paper and slipped it into a treasure chest he was burying. Late that night, a storm blew in. Waves 100 feet high dashed the ship to pieces and not one man survived. Pirate Pythag's treasure map was lost to the sea.

Matie, you are going to find out this treasure.

1) First Prepare a treasure map. Tape together 4 paper together. Flip the map and Trace a cross at the middle.
get a ruler and a pencil and color pencils.

3) Write yer name in the upper right corner.

4) Write yer scale as 1 cm = 1 0ace in the lower right corner.

5) Use the seams between yer papers as a giant compass. Label the top of the vertical seam as North and label the other seams as South, East, and West.

6) decorate your map. be creative. (palm trees, streams, boats, animals.. monsters, use your imagination extra credits for the best ones)

7) Cut the cards , carefully, see below. Shuffle them. Face down of the table. Make a pile.

13 paces North

5 paces EAst

11 paces South

12 paces south

7 paces west

10 paces west

5 paces North

16 paces east

say "Ahrrr! "

10 paces east

say "shiver me timbers"

4 paces south

stand up, shade yer eyes with
yer hand and then sit down

11 paces west

12 paces north

8) pick one order from the pile and follow the order. For example, if it says 3 paces @ East, draw a line , with a ruler, 3cm long @ east.
disregard the instruction you just picked. (don't put it back in the pile) and keep going. If an instruction leads ya off the paper, put it back in the pile and pick another instruction. After following yer last instruction, draw an "X"as in "X marks the sport"

9) Compare yer results with yer maties in the class.

10) write the secret rule for vector addition in an empty space on your map.