Recent content by Alexstrasza

Actually, part of what makes me anxious is like you said - when I tell people I am going to study Physics, they are like "wow that's heavy". I am already prepared to have no life, so yes, I am okay with the hours. XD Just scared of sitting 80 hours and not understanding anything... I have my...

I am studying abroad, but my SAT was not that good (2070). Calculus was not too hard for me. I don't party, but I have this thing when I am anxious I just freeze up and stare at my homework and don't understand anything.

Thanks for the reply. I will do my best to study hard every day. I made my schedule so I have some space between classes where I can go to the library because it's way easier to study there than at home. Oh yeah, the math courses in physics also seem a bit scary... This year, I have: Linear...

Hi guys... I am starting university in about two weeks. Last year my physics teacher was very good, and he caused me to be interested in physics. I started reading Feynman and he also made it sound really interesting. My parents are programmers so it was assumed I will study that. But I felt no...

Homework Statement I have a linear integral (e^xsiny-2)dx + (e^xcosy+x^2)dy y≥0 2x=x^2+y^2 I used Green's theorem and got: ∬ (e^xcosy+2x) - (e^xcosy) dy dx x bounds: from 0 to 2 y bounds: from 0 to sqrt(2x-x^2) After solving all that stuff I get to: ∫ (2x) (sqrt(2x-x^2)) dx x bounds: 0 to...

Oops, when I solved for x=1 I got 0 and for some reason assumed solving for x=0 would also be 0. I got 2/9 final answer. Thank you for helping. :)

Thank you! I solved it and got 0 for an answer, is that possible?

Homework Statement Hi, I have a double integral with square root of 1-x^3 that I can't solve. Here is the integral and attempt at the solution. I get stuck! Homework Equations I am in Calc II. Mostly we used integration by parts, or substituting t=something for most "difficult" integrals...

Thanks for the replies everyone. Sorry for late update. The question was asking to find which ball will reach the maximum height. I tried to solve using energy conservation but then it gives me the same solution for both. Isn't N always perpendicular to the surface? Energy = initial velocity...

Homework Statement Two identical balls, one is thrown at angle α up a frictionless surface, the other one is thrown at the same angle up in the air. Both have the same initial velocity. A. Which one travels further? Explain. B. Is the mechanical energy of the first ball conserved? Explain...

I was not sure that it is the same force. I thought maybe in the second case we need to add a force to the net force, like tension, that I missed. This was a question on a test today and some students' answer was different from mine. Okay, I see! The third mass is not the same as F force...

Homework Statement Picture related [/B] 1. There is a system of two blocks tied to each other. There is a force F on the small block causing the system to move at a certain acceleration. Find the acceleration. 2. (This is the one I'm not sure about) Instead of force F, we add a pulley with a...

Thank you! I wrote new equations and I think I solved it. 1) For maximum mass, the direction of block B pulling down is positive, so: (mass of B)(g) = T T = sin(45)(mass pf A)(g) + friction force = 707.1 + 70.7 (mass of B)(g) = 777.8 mass of B = 77.78 kg (our teacher allows us to use 10...

Thank you. :) I tried to find the force of friction = μ * (F normal) = 0.1 * (cos(45)mg) = 70.7 N But I don't know how to find maximum or minimum friction force. What is the range? Given that the coefficient of friction is 0.1 I would assume that is the maximum but what is the minimum? 0?

Homework Statement The pulley system is stationary. What is the maximum and minimum mass of block B to keep the system stationary? We know that: Mass of A = 100 kg Angle = 45 degrees μ = 0.1 Homework Equations F = ma The Attempt at a Solution I know that in order for the system to stay...