Four identical uniform rods of mass `M=6kg` each are welded at their ends to form a square and then
Channel: Doubtnut
Date: 2020-01-26

Four identical uniform rods of mass `M=6kg` each are welded at their ends to form a square and then welded to a uniform ring having mass m=4kg & radius R=1m the system is allowed to roll down on the rough and fixed incline of inclination `theta=30^(@)` (assume no sliding anywhere) Q. The minimum value of coefficient of friction to prevent slipping is-