Recent content by asc3nd

Can we get more people on this?? I think this problem is pretty challenging, since we're not given mass or acceleration and are finding for mu.

How would you calculate the velocity (and I believe in this case it's the angular velocity)?

Ok so when it's on an incline it's .3535, which is correct. Using the rotating method (which is what we have to do) they don't match. EDIT: I calculated velocity, by doing the (2pier/time)

Imagine the books being the ruler and the long brown thing to be the cd.

LP : http://www.5inch.com/product_shots/27/lp_print.jpg

Those old disks, like rly rly old cd's. (that have the rod coming and rotating the "cd's".)

o you couldn't look at the video ... maybe that's why you were using those complex formula's (atleast to me lol). Anyway I solved for it and got a value of .543, which seems more appropriate. Ok so I'm still unsure on if my velocity is correct. I'll quickly explain the video. The LP moves in a...

The problem is that I can't (a) use w in the problem (since we haven't been taught it yet) and (b) we haven't learned angular displacement so the whole change and in theta will not work. Using what you had I simplified it to mu = (v^2) / (rgcos(theta)) Checking to see if it works

one slight problem...we aren't allowed to use mw^2, and also haven't touched upon angular momentum (ap physics: b) There has to be another way to solve this problem...

Homework Statement http://paer.rutgers.edu/PT3/experiment.php?topicid=5&exptid=61 You can use the arrow keys to watch frame by frame (later used to measure time) Homework Equations F_friction = \mu(f_normal) F_c = mv^2/r The Attempt at a Solution So in the first attempt radius is 7 inches. We...

1. This was just a quick question that I was thinking about. If you jump of a really tall building, let's say 100-story building and you fall most likely you won't live to tell the tale. But let's say you jumped with a cardboard (or any object) and a couple feet before you hit the ground...

O thanks a lot! I'm waiting for it to be approved by the admins...

I'm sort of unsure on what you mean by Ftx and Fty and then using the pythagorus on Fg. Do you think it's possible for you to paste a diagram? That would be amazing

1. http://paer.rutgers.edu/PT3/experiment.php?topicid=5&exptid=177 The three black stoppers that are whirling in a circle have a combined mass of 58.7g. The length of man's arm from elbow to wrist is about 30 cm. 2. Find the mass of the other object that is tied at the bottom. 3. I solved for...

Im still in high school, and although our school doesn't offer any astrophysics courses, I was hoping on reading some books to learn more. I've read the Inflationary Universe ... any other suggestions?