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AP Physics 14 Online
OpenStudy (anonymous):

HELP PLEASE :D The 3.0 kg, 60 cm diameter disk in the figure below is spinning at 280 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 5.0 s? - i keep getting 7.92 but that's not correct

OpenStudy (anonymous):

ha never mind my calculator was in radian mode :/ always make sure your calculator is in degree mode

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