The spool, located on a horizontal surface, is pulled by four threads wound on it. The forces are applied at angles to the horizon line a1=45°. a2=30°. a3=60°. a4=45°, the magnitudes of the forces are related as F1 : F2 : F3 : F4=1:2:3:2. The ratio of the radius of the spool rim and the radius of the cylinder on which the threads are wound is R/r=2. There is no slippage. Which way will the coil roll?
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