Recent content by cojaro

Gnosis, what's provided in Part 1 is all that my textbook gave me (6th Ed. Wiley/Meriam/Kraige "Engineering Mechanics: Dynamics", if you're interested which book.) Personally, I'm not too fond of my textbook. Each section so far is rarely more than 5 pages, then 2 example problems and 30+...

You get a Scooby snack =D Part of the mystery (for me, at least) is solved! XD

y_0 and x_0 were defined. And I'd never let y or x represent velocity components. I use v_{y_0} and v_{x_0} for that.

No, not at all =[ I've filled quite a few pages of notebook paper just trying different approaches and solutions, working backwards from the answer, etc. I'm not making it more complicated that it really is, am I? I tend to do that.

I guess I wasn't clear. =\ I hate this problem. The object's fired from H=0 towards H=H_{max} at an angle \theta.

So far in my experience (I'm a second semester Sophomore ME), I've noticed that I learn a lot of the concepts and such from my physics courses (I'm in Physics III now) without much practice, whereas in my engineering courses I'm really using any physics I've learned up to this point. For...

So in my continuous efforts, I realized that u = \sqrt{v_y^2 + v_x^2} so it's clear that v_y^2 = 2gH and, with a little work, that v_x^2 = \dfrac{gL^2}{8H}, but that's as far as I can get. Working backwards really doesn't help all that much. I've been trying to find where the L/4H comes from...

Yeah, you're right. I missed that. My mind is blahhhh after this week.

1. "A projectile is fired with a velocity u at the entrance A of a horizontal tunnel of length L and height H. Determine the minimum value of u and the corresponding angle \theta for which the projectile will reach B at the other end of the tunnel without touching the top of the tunnel."...