Recent content by TimmyJ1203

Money is not an issue - I have worked enough to pay my way through college (being married young also helps). I can see what you two are saying, and sadly, I do agree. I would like for my choice to strictly involve the quality of education I would receive, but I guess that that is also highly...

Hi! I'm trying to decide between Cal Poly Pomona and UCLA for Aerospace Engineering. I'm wondering specifically about classroom dynamics and professor-student relationships. I'm ready to transfer and I have already been admitted into both universities. Any information and advice is helpful...

I still don't understand. It still looks like (-9, -9, -9) satisfies it. ##(x_1, y_1, z_1) + (-9, -9, -9) = (x_1 - 9 + 9, y_1 - 9 + 9, z_1 - 9 + 9)## Does this use the definition we were given? I'm getting frustrated, because I do not understand. It seems like two people here are telling me...

Okay, let me try this again: Part b) Verification of 4: v_1 + v_2 = v_1 (x_1, y_1, z_1) + (x_2, y_2, z_2) = (x_1, y_1, z_1) So, v_2 could be (-9, -9, -9)? Therefore, property 4 holds? Verification of 5: v_1 + (-v_1) = 0 The additive inverse could just be any vector in the set based on the...

Homework Statement Hello, here is the question: "Rather than use the standard definitions of addition and scalar multiplication in R3, suppose these two operations are defined as follows. With these new definitions, is R3 a vector space? Justify your answers. a) (x1, y1, z1) + (x2, y2, z2) =...

Okay, so this is what I got so far: F_x = F * sin(α) F_y = F * cos(α) F'_x = F * sin(α) F'_y = F * cos(α) P_x = 0 P_y = P ΣF_x = Fsinα - Fsinα = 0 0 = 0 ΣF_y = Fcosα + cosα - P = 0 2Fcosα = P F = P/(2cosα) I know I'm somehow supposed to substitute cosα for known values but all I can think...

Sorry.. I used the word adjacent incorrectly. Here is what I drew so far. I still don't understand how beta can be related to theta. I'm attempting to imagine the pulley setup, and it seems like no matter what angle theta is, the forces F and F' will be equal and unaffected.

But is theta equal to beta? I just realized that I didn't include my updated drawing. I named the angle, that is adjacent to theta, beta.

Okay, so I tried drawing a FBD of point B, but I'm still not sure how to equate the measurements. My friend recently mentioned to me that the pulley may be hanging directly in the middle of the cable. If that's the case I can use the tangent value of alpha to put d/2 and h in it, but I'm still...

OH, okay, I'll try this. There are four problems after this one that I did no problem. Not sure why I didn't see that.. I'll work on it a bit. Thank you.

Homework Statement 1. Pulley B is free to move on the cable ABC which is fastened at A and being pulled by force F through the pulley C. Neglecting friction: a. Determine location of point B as a function of d. b. Express the force F required to maintain equilibrium in terms of P...

Sorry, it's probably something really simple!

Are you inputting the answers into Mastering Physics? Perhaps, the asterisk is the issue. If you're entering -1.3x10^-5 C/m, it will not recognize that as a valid answer. Also, if the units are already included on the side, you have to omit them and just submit the number: -1.3*10-5.

-1.3*10-5C/m?

That has to be the answer; may I ask how you're inputting it in scientific notation?