Recent content by PhysicsCollegeGirl

Homework Statement L-1{[(2s-1)]/[(s^2)(s+1)^3]} Homework Equations L{f(t)e^(at)}=F(s-a) The Attempt at a Solution I have tried million ways but the different exponents in the denominator are throwing me off. The other problem is that I cannot use partial fractions, the homework instructions...

Ok, I understand now what you are saying. It is indeed a problem with a mass that can fall off, like a roller coaster, I didn't put the picture but it is like that. Using net force = mass * centripetal acceleration I got 4.95 m/s, just like @CWatters. Thank you for making it more clear. With...

Hello! I am having problems with this exercise if someone can please help me. Homework Statement In order to go all the way around a frictionless circular loop of R=2.5 m , how fast must a mass be moving as it exits at the bottom of the loop. 2. The attempt at a solution I am doing this...

Homework Statement [/B] There are three problems that I am struggling with. 1. ∑[k2(x-2)k]/[3k] 2. ∑[(x-4)n]/[(n)(-9)n] 3. ∑[2k(x-3)k]/[k(k+1)] The Attempt at a Solution On the first two I am having problems finding the end-points of the interval of convergence. I use the ratio test. 1...

Thank you! The basket analogy was really useful. I understood the others only after I read yours, so thank you to everyone too.

Hello, I am currently 21 and I am studying environmental engineering. Even though I went for engineering, I always liked physics and would like to take more than a couple of pure physics courses. I have yet to decide on that, but meanwhile I joined the forum to really understand what I see in...

1. Homework Statement An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the floor drops away (see figure). The coefficient of static friction between person and wall is μs, and the radius of...