Friday

March 27, 2015

March 27, 2015

Posted by **Joey** on Tuesday, December 7, 2010 at 6:25pm.

If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall is 0.5, how do you find minimum speed you would need to stick to the wall of the ride? Is he saying that I take 2*5(r) *9.8(g)? If not, please explain.Thank you

Physics-Please help with formula - Damon, Tuesday, December 7, 2010 at 11:11am

you need a centripetal acceleration equal to 2g if the mu is 1/2

Force down = m g

friction force up = mu m v^2/r

g = mu v^2/r

v^2/r = g/mu = 2 g

v^2 = 2 r g

Physics-I think I have it-Please check - Joey, Tuesday, December 7, 2010 at 5:29pm

Is this correct? I published something else earlier-that has to be wrong but I think this is correct.

Force friction balances weight

Force friction comes from force normal to create centripetal force

mv^2/r = Force normal

Force friction = mu x Force normal = mg

mu x mv^2/r = mg

9.8/05 = 19.6 m/s^2

19.6/5=3.92

sqrt 3.92 = 1.98 rads/s

- Physics-Please check if I did this correctly -
**Joey**, Tuesday, December 7, 2010 at 6:45pmPlease scroll down for the entire answer-I did it once in the first paragraph and than after Damon's response, I did it again-I think the 2nd one is correct, maybe-

Thanks you

**Answer this Question**

**Related Questions**

Physics - posted this question this morning but I'm not sure of the response ...

Physics-Please check - I posted this question this morning but I'm not sure of ...

DrBob222 please check - DrBob222 please check my physics question posted at 8:...

Physics - please check over - Could I please get some further assistance on a ...

To:Damon - You didn't help on the second question I asked so I posted it again, ...

To: Damon - Please help me on 1 more question, I posted it with my previous ...

physics Again - bobpursley can you please check my reply to your post about my ...

American Literature - I posted this question twice by mistake and the response ...

psychology - In class we were asked to provide an one example of classical and ...

to KEEGAN - Please use "Post a New Question" and then be sure to ask a question...