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A top-loading washing machine has a spin cycle that rotates at 8.5 cycles per second. The spinning drub that holds the clothes has a radius of 35 cm.

What is the linear speed of the clothes?

ω = (8.5 cycles/s) / (2pi rad) = 53.4 rad/s

v = ωr = (53.4 rad/s) * (0.35 m ) = 19 m/s

A damp pair of jeans has a mass of 2.0 kg. What is the magnitude of the normal force acting on the jeans by the wall of the drums as it spins?

ΣFy = may

Fn - mg = (mv^2) / (r) = ... = 2083 N

What is the minimum coefficient of static friction necessary so that the clothes can remain stuck to the middle of the drum wall, and not just slide down to the bottom?

I got stuck here on the last question.

I can't seem to figure out what a is in the x direction. My guess is 0, so the static friction is 0?

But that doesn't sound right. Could someone help me please?

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# Homework Help: Coefficient of static friction of clothes

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