Recent content by Al3x L3g3nd

Right because 2mgsin(θ) - ilB = 0 Thanks so much for your help!

Wow I'm dumb. I keep forgetting that you can just relate lengths to forces using trig (which seems super counter intuitive but hey, it's physics). That was the only push I needed to figure this out. sin(theta)=d/(1/2L) -2mg(d/(1/2L))=F d=-(L/4mg)F It should not be negative though... Is this...

Should be two of them. One tension from P to top contact and another from P to bottom contact. Both going to the left. Just want to confirm if that's correct. And yeah there is equal and opposite tension in the y direction. So we're left with -2mgsin(theta)=ilB Now that I have an equation to...

Yes I misunderstood then. Tx left, F right so -mgsin(theta)=ilB. Can you confirm if it's -mgsin(theta) or -2mgsin(theta)? Also, how am I going to get rid of theta by the end of the derivation? And when do L and d come in? Like what? Magnetic field of wire is clockwise so how do I relate that to...

So what you mean is that if the x component of the tension is moving toward the right, then the magnetic force has to go to the left? Unless I'm misunderstanding which force you are referring to. So then -ilB=mg(xcomponent) If there are two points of contact should it be 2mg(xcomponent)? Also...

I have no idea when to start relating equations together or what equations I need to use.

lol whoops. I did not know they uploaded automatically without confirmation.

For some reason i can't upload a picture here so here's a link. http://i.imgur.com/aEOgt7Y.png

Homework Statement This is a magnetic force lab for the second semester of a physics lab course. The setup of the lab is as follows. A wire of length L hangs vertically between two contact points and has a mass with mass m attached to the bottom of it. The wire sits between two magnets in...

Homework Statement Does the series \Big( \sum_{n=1}^\infty\frac{1}{(3^n)*(sqrtn)} \Big) Converge or Diverge? By what test?Homework Equations 1/n^p If p<1 or p=1, the series diverges. If p>1, the series converges. If bn > an and bn converges, then an also converges. The Attempt at a...

Shoot. I don't know how the formatting works on this site. The squigly line is an integrand and they all go from 0 to pi/2.

Homework Statement Use substitution to show that for any continuous function f, $$\int_0^{\pi/2} f(\sin x)\,dx = \int_0^{\pi/2} f(\cos x)\,dx.$$ Homework Equations $$\cos(\pi/2-x)=\sin x$$ The Attempt at a Solution My confusion is that f is inside the integral, and I have no idea...

wow i feel dumb for not realizing that. thanks :)

Homework Statement Find derivative of f(a) for f(t)=(2t+1)/(t+3) using the definition of a derivative Homework Equations f '(a)=lim as x goes to a of (f(x)-f(a))/(x-a) The Attempt at a Solution f '(a)=lim as x goes to a of (f(x)-f(a))/(x-a) f '(a)=lim as t goes to a of...