Theory of Machine
The frequency of oscillation of a torsional pendulum is

r/2πk. √(l/g)
2πk/r. √(g/l)
2πr/k. √(g/l)
r/2πk. √(g/l)

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁ and r₂ = External and internal radii of collar respectively)

(2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]
(1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]
(2/3) μ W (r₁ + r₂)
(1/2) μ W (r₁ + r₂)

ANSWER DOWNLOAD EXAMIANS APP