Solution of task 14.1.12 from the collection of Kepe OE

Solution of task 14.1.12 from the collection of Kepe OE

14.1.12
A homogeneous disk of radius R = 0.5 m, whose mass m = 20 kg, rotates with a constant angular acceleration? = 10 rad / s2.
Determine the modulus of the principal vector of external forces acting on the disk. (Answer 0)