Answer:
T = 2.78 x 10⁻³ N.m
Step-by-step explanation:
given,
μ = 0.1 N.s/m²
diameter = 30 mm = 0.03 m
d y = 2 mm = 0.002 m
L = 0.03 m
ω = 350 rad/s
u = r ω
u = 0.015 x 350 = 5.25 N/s


τ = 262.5 N/m²
torque
T = τ A r
T = 262.5 x π r² x r
T = 262.5 x π x 0.015³
T = 2.78 x 10⁻³ N.m