Practice

Questions

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Engineering

Q.27. A 0.5 kg mass is in contact against the inner wall of a cylindrical drum of radius 4m rotating about its vertical axis. The minimum rotational speed of the drum to enable the mass to remain stuck to the wall (without falling) is 5 rad/s. The coefficient of friction between the drum's inner wall surface and mass is ____. (Take g = 10 m/s²)