Twin graphs?

Getting ( d=v2t+1/2at² ) Equation Number 3 from a v-t graph
 you need the 2 main equations. the "mother" and the "father"
The area of the Triangle can be calculated using -----> d=1/2(v2-v1)t 
                       Rectangle can be calculated using ---> d=v2t


Combine the two ---> d=v2t + 1/2t (v1 - v2)t <-------- (-_-)
 
a=(v2-v1) / t or at=V2-v1 <--------- (^_^)

                                             Sub (^_^) into (-_-) to form 

                                             d=1/2t(v2-v1)+v2t

                                               =1/2t(at)+v2t

                                               =v2t + 1/2at²

 

 

 

The area of the Triangle can be 

                                calculated using -----> d=1/2(v2-v1)t 

Large Rectangle can be calculated using ---> d=v2t

Therefore the imagery triangle minus the large Rectangle 

 

        d=V1t-1/2t(v2-v1)

         =V1t-1/2t(at)

                                                                     =v1t - 1/2at²

 

Matching graphs

You stay as 1m for 1 second then you walk at constant pace for 2 seconds way from origin then toward the origin for 1s then stop at 1.7-1.8m. [1]

start at 3m then you walk at constant pace for 3 second; stop at 1.5m for 1s, sprint to the origin for  second, stop at 0.5m for 2s then run away from origin[2]

Stay for 2 seconds; move at a constant pace for 2 seconds, stop for 2 seconds then walk at constant speed [3]

This in a velocity time graph. in this graph you walk backward then you speeding up , then you walk a a constant pace in the same direction. you walk forward at a constant pace then you stop. [4]

Start at 0.8m move at constant speed for 3.75s, tops for 2.5s the runs 3.25s [5]

You walk backwards for 3s then forward at a constant pace for another 3 second then you stop. [6]

[1]

If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration







[2]

If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration








[3] If this was a d-t graph. It would be then a line on the x-axis then a straight line at an angle going up then a line on the x-axis then a straight line at an angle going down (stops at the origin)
If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration 

[4]

If this was a a-t graph there would be a positive horizontal line an a straight line on the x-axis because there was no acceleration afterward

[5] If this was a v-t graph A positive horizontal line, then a line on the x-axis then a positive horizontal line

If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration

[6] If this was a d-t graph. It would be a straight line at an angle going up then a straight line at an angle going  down.
If this was a a-t graph it would be a straight line on the x-axis because there was no acceleration

Motor; spin and burn

On Thursday 30th the whole class walked in the room in hopes that their motor will spin 3 time (1080 degrees). We all brought in supplies such as paper clip, wood, soda cans, and nail for what we couldn't bring Mr.Chung kindly brought such as the hammers and corks.

I started off by hammering the four nails in to the plank of wood with the distance of 4 cm apart while my partner Lena sanded the soda cans to perfection.
After I finished with the hammering, I try to make the axle by sticking a kabob stick through the cork. At first it seemed easy until the point where the stick reach the middle of the cork and it wouldn' move after snapping 2 kabob sticks i found out that you first use a nail fist to make a hole, finally on the  third try i successful finish make the axle and Lena finished sanding the soda can strip and making the base for the axle to rotate on.
Then my panther started warping the copper wire around the cork while I was making the base more secure.

There we are finished and only need to test it out.

Test number one (not really) : Rejected do the the wires not being parallel to the commutator pins.
Test number one  : failed commutator pins were too close to the cork.

Test number two  :Unknown

Overall I gained valuable knowledge of where my mistakes were and how to avoid them in the future.