The Big Five

Andrea has kindly allowed me to steal this picture from her blog. (:

Equation number 3 is d = v1t + 1/2at2.
This can be derived from the graph. The first part of the equation is basically the area of the rectangle. The second part of the equation is basically the area of the triangle. Add them together and you get the area of the trapezoid. (:

Equation number 4 is d = v2t - 1/2at2
The first part of this equation is a big rectangle (b x h). The second part is the area of the triangle that isn't part of the graph. Subtract them and you get the area of the graph. (:

translating graphs

Original graphs (B)

(C)

(D)

(E)

(F)

(G)

And the graphs translated:

Motors (:

So in class today we made motors. That was pretty cool. We used things like wood, nails, corks, and a part of a pop can and it spun...or it was supposed to, anyway.

Ours worked on the second day, after making some slight changes.

We basically hammered nails into a wood base and tacked the brush onto the base as well. We stuck a kabob stick into a cork and stuck nails in it. Then we wrapped wire around it and hooked the whole thing up.

When the magnets were added (that's what the nails were for) and it was connected to the power source, it spun. (:

And there were sparks.


I thought this was relevant.