Recent content by crazy_shoes

Thanks! It's much appreciated. Good thing I have a whole week to finish studying for my test!

So, if my position in the x direction is a function of time, like x=2t^2 the derivative of that is 4t which should be my velocity in the x direction. Then a second derivative should give me 4 and that should be my acceleration in the x direction. Am I on the right track?

OH! So it would be 2t then... If the function was in fact t^2.

For the formulas I have you still need \Delta x and \Delta t v_x = lim_{\Delta t \rightarrow 0}\frac{\Delta x}{\Delta t} ...and yes, this is calculus based. I feel like I've missed a lesson or missed something in class.

If I'm using position to get a velocity vector with the formula V_x_{avg} = \frac{\Delta x}{\Delta t}, can I use t = 0 for my t_i?

Ah, that makes a lot of sense! Thank you so much! I was completely overlooking that.

I'm having terrible difficulty starting this problem, it's one of the chapter excercises in the book and it's revisited in the homework later on. I'm going to give different data, as I would like to actually solve this one myself, I just need a kick start... Homework Statement We've got an...

Wow, you learn something new every day! I'd never heard of radio modems before. This is some good stuff! Thank you all for your input.

I'm looking for some sort of wireless data transfer and I need it to be very focused. I need something similar to a TV remote, very directional, fairly long range. I'd like it to be as precise as possible and as fast as possible. I'd also like it to be as harmless as it can be, since lasers...

Aaah... I see what I did wrong, I simply forgot that a=-1, I was thinking a=1. When I set a to -1 instead of 1 it all works out! Thanks!

I'm trying to find where this function increases and decreases: f(x) = = - x^2 - 6x - 8 I can get the vertex (h, k), which works out [by my math] to be (3, -17). I'm just not sure where to go from here to get information like: point of increase and decrease domain and range...