Static Slip
January 19th, 2008
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Static Slip
How far up the ladder can an 810 N person climb before the ladder begins to slip?
An 8.0 m, 270 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.65, and the ladder makes a 50.0° angle with the ground. How far up the ladder can an 810 N person climb before the ladder begins to slip
See attached link. Substitute your numbers.
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Deflect-o Standard Anti-static Chair Mat $158.99 0% 1 1 Each 25" Width x 12" Length 46" 60" 60" Length x 46" Width - Overall These standard antistatic mats are ideal for use with computers and other electronic equipment. Chemically formulated to safely neutralize static electricity before it can harm computer without using ground cords. Designed and properly weighted for firm, low-pile carpets with padding. Unique notched stud design grips carpet without piercing or damaging carpet backing. Textured surface for scuff-resistance and slip-resistance. Beveled edge for smooth on and off chair movements. Beveled Edge CM43433F Carpeted Floor Chair Mat Clear Deflect-o Deflecto Corporation No Scuff Resistant Slip Resistant Standard Anti-static Chair Mat Studded Textured Surface Vinyl www.deflecto.com |
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Eviteo-clear Professional Anti-Static Clean Gloves $4.14 - Used in: wear the gloves when cleaning the camera or pc/laptop to more protect products and person. - Special characteristic: anti-slip, antistatic and non fiber loss when using. - Are you in the professional photography career right now? This is one of the stuff that you must keep it. - This is a brand new pair of Eviteo-clear professional clean gloves. - The thenar part of gloves made of anti-slip fabric with rubber dot, for more safety and to avoid of equipment slip when using. - The gloves fabric weaved the conductive fibre, which can conduct the static to avoid of dust adhesion. - Anti-Slip - Antistatic - All clean gloves are in average size, approximatelly 10cm wide for the palm size. - If pick up, based in New Lynn region |
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What is the minimum coefficient of static friction so that the people will not slip down?
In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." The room radius is 4.3 m, and the rotation frequency is 0.4 revolutions per second when the floor drops out.
What is the minimum coefficient of static friction so that the people will not slip down?
In this case the Normal force is the centripetal force = mV²/R = Fn
{where m = mass of person}
R = 4.3 m
V = tangential speed = 0.4 rev/sec x 2π rad/rev x 4.3 m = 10.8 m/s
The coefficient of static friction = µs
Force that acts to pull a person from wall is their weight = mg
{where m = mass of person)
Force of static friction = FFs = µs x Fn = µs(m)(10.8)²/4.3 = (µs)(m)(27)
The minimum µs:
FFs = mg
µs(m)(27) = mg
cancel m's
µs = g/27 = 9.81/27 = 0.36 ANS
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Tags: anti static slip, anti static slippers, friction, gloss, high, low, non static slip, shrink, static slip