Recent content by thebigeis

This question is actually posted up, but not under a very descriptive title so I'm reposting it and hoping the admin will just close my other one... sorry. Anyway, here is my problem- #1) A typical lab centrifuge rotates at 4000rpm. Test tubes have to be placed into a centrifuge very...

Oh, wow, I figured out it out. Thanks a bunch, AM. You really helped me out.

a = v^2/r ... I am pretty sure that's what you're asking and then how can I get the angular speed if i don't have the period it takes for 1 revolution?

I'm not given the angular velocity, so I'm assuming it's a number that I should already know. I don't have the mass either. Isn't "normal gravity" mass * acceleration, acceleration equaling 9.8m/s^2. This is why I'm confused. What I wrote above is all I'm given.

Suppose a space station is constructed as a 1000m-diameter cylinder that rotates about its axis. What rotation period will provide "normal" gravity? This is the work I have for this. angular velocity = 9.8 r = 500m 2pi500/T = 9.8 2pi500/9.8 = T T = 320.57 What did I do wrong?

You should have 2 vectors on an XY-coordinate system. If that's what you got, one shouldn't be directly on the xy-planes, so you're going to have to look for the x and y components for a particular vector. Once you do that, think in respect to the point he should be at to the point he is at.

Nonuniform/Uniform Circular Motion... i think I keep putting my posts in the wrong forum. Anyway.. I have a few problems left that I'm completely stumped on how to do. #1) A typical lab centrifuge rotates at 4000rpm. Test tubes have to be placed into a centrifuge very carefully because of...

Impossible Physx Homework! I have a few problems left that I'm completely stumped on how to do. #1) A typical lab centrifuge rotates at 4000rpm. Test tubes have to be placed into a centrifugre very carefully because of the very large aceelerations. What is the acceleration at the end of a...

Circular Motion Situation: A concrete highway curve of radius 70m is banked at a 15 degree angle. Question: What is the max speed with which a 1500kg rubber-tired car can take this curve without sliding? Feedback: I learned that the static coeffiecient of friction of rubber on concrete...

I got #1, but for number 2, I don't knwo the relationship between rotational and linear speed...

In one revolution fo a circle is equal to 2pi. And in the problem it says one period is 4s. And if I'm getting this straight, which I'm not, 2pi/4 would be the rev/s?

Sorry, I don't have anything to help you out with; but I just wanted to tell you your problem helped me solve my problem. Apparently I had incorrect values for the radius of the Earth and the period of the Earth. Thanks, Fungamania.

I just got #1.

I am having some trouble with my physics homework. #1) A 300m-tall tower is built on the equator. How much faster does a point at the to of the tower move than a point at the bottom? #2) A 5m-diameter merry-go-round is initually turning with a 4.0s period It slow down and stops in 20s...

I am having some trouble with my physics homework. #1) A 300m-tall tower is built on the equator. How much faster does a point at the to of the tower move than a point at the bottom? #2) A 5m-diameter merry-go-round is initually turning with a 4.0s perio.d It slow down and stops in 20s...