What is the coefficient of static friction between the button and the platform [Solved]

A small button placed on a horizontal rotating platform with diameter 0.326 m will revolve with the platform when it is brought up to a rotational speed of 42.0 rev/min, provided the button is a distance no more than 0.144 m from the axis.

centripetal force = friction

mr^2 = mg
r^2 = g

(0.144 m)[(42.0 rev/min)(2 rad/rev)(min / 60 s)]^2 = (9.81 m/s^2)
= 0.284

This post is last updated on hrtanswers.com at Date : 1st of September – 2022

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