centripetal force

[Flinthill84]

a small object is placed 10cm from the center of a phonograph turntable. it is observed to remain on the table when it rotates at 33 1/3 rev/min but slides off when it rotates at 45 rev/min. Calculate the centripetal force.


if anyone has any ideas what so ever they are greatly appreciated as i am all out.

[UrbanXrisis]

use: Fc=4π2mr/T
however, you need a mass. Force is mass times acceleration. Without a mass, I'm not sure how you would find a force.