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