Asmall button placed on a horizontal rotating platform with diameter 0.520 m will revolve with the platform when it is brought up to a speed of 35.0 rev/min , provided the button is no more than 0.240 m from the axis. what is the coefficient of static friction between the button and the platform?

For the position of button we can use force balance as

Friction Force = Centripetal force

so here we will have

here we know that

R = radius of circle where button is placed

f = 35 rev/min

now from above equation

so friction coefficient will be 0.33

i dont know but

explanation:

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2b2t

explanation:

2b2t