Thursday, November 15, 2007

Velocity is Speed with Direction

In class we have looked at several scenarios dealing with acceleration and velocity. We have used the following formulas:

h = -10t^2 - 30t + 200 from Look Out Below
h = -16t^2 - 7.85t + 65 from HW22: Big Push
h = -16t^2 + 50t + 90 from HW23: Problem 2c

What is the significance of the sign of the velocity term? - 30? - 7.85? + 50?

Is the sign of the velocity term for our Ferris wheel problem always negative (- 7.85) as seen from HW22?


Mr. Marti said...

Good evening class it is I, Mr. Marti. It is my upmost pleasure to announce that there will be no more homework for the rest of the school year. And if for some reason I take it back tomorrow in class or deny that this is the real me, ignore what I say and listen to this message. Thank you, and good night.

mr. marti said...

please dont believe that fool. i am the real mr. marti. and would i ever say anything like that? no homework --- come on now.....

you need to study the master some more before you try to impersonate me.

upmost pleasure....
more like a trendsetter,
eventhrough stormy weather,
i bring rays of light
so your mind can shine so bright
increasing your knowledge height
i think i may, i think i might
facilitate mathematical conversations,

i need to quit.

Anonymous said...

hmmm hmm hmmm

Ms. Anibogu said...

Dear Mr. Mahti and Stoodents,

Stoodents, you shold be ashemed of yoselves, pretending to be Mr. Mahti. If I were still teaching, this would not be hahpening.

Mr. Mahti, you ah fired.

Sincerely, '

Nneka Anibogu