homework question, need help asap, please

by jks8686
Tags: asap, homework
jks8686 is offline
Jan24-08, 12:17 PM
P: 1
1. The problem statement, all variables and given/known data

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. The cylinder begins to rotate about a vertical axis. Then the floor on which the passengers are standing suddenly drops away! If all goes well, the passengers will “stick” to the wall and not slide. Clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70.

2. Relevant equations

T = 1/f

and so the people dont slide

(coefficient of friction) (Fn)= mg

( (coefficient of friction)*m*v^2)/ r = mg

3. The attempt at a solution

(coefficient of friction) = (g*r)/ (v^2)

T = (2*pi*r)/ square root of ((g*r)/(coefficient of friction))

and f= 1/T

I got 0.4068 = f
but the program says I am wrong
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berkeman is online now
Jan24-08, 12:25 PM
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What did you use for the coefficient of friction? What did you use for the radius?
Doc Al
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Jan24-08, 12:29 PM
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Assuming that the question was to find the minimum frequency to insure that they wouldn't slide, it looks OK to me. How was the question phrased exactly?

abs89 is offline
Jun18-09, 02:02 PM
P: 1

homework question, need help asap, please

The 0.4068 is rotations in a second. You had to multiply that value by 60 to put it into rotations per MINUTE.

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