Vikas TU
Last Activity: 4 Years ago
It is given that,
mass of cylinder, m = 5kg
radius of cylinder , r = 30cm = 0.3 m
angular impulse , ∆L = 3kgm²/s
here, initial angular speed is
angular speed after 4s =
we know,
angular impulse = change in angular momentum
3 =
Here I is moment of inertia.
3 =1/2 mr²( -0)
6 = 5 × (0.3)² ×
= 40/3 rad/s
now, use
40/3 = 0 + × 4
= 10/3 rad/s
now angular speed after 30 sec = 0 + 10/3 × 30
= 300/3 = 100 rad/s