Q

# a rotor has a diameter of 4 m. the rotor is rotated about

15480520357131384414875.jpg A rotor has a diameter of 4.0 m. The rotor is rotated about central vertical axis. The occupant remains pinned against wall, when the linear velocity of drum is 8 m/s. Compute coefficient of static friction between the wall of rotor and clothing of occupant (Fig. 1.13). Also calculate angular velocity of drum ? How many revolutions will it make in a minute ?
$\mu N =mg\\ \mu \frac{mv^2}{r}=mg\\ \mu=\frac{gr}{v^2}=0.3063\\ \omega=\frac{v}{r}=8/2=4 \ rad/sec\\N=\frac{\omega\times60}{2 \pi}=38.21rpm$