Question

answer it fast as soon as possible

Answer 1

I→ moment of inertia of the disc.
w→ angular velocity
L→ angular momentum

I = mr²/2
I = (2)(1)(1)/2
I = 1 kgm²

Rotational kinetic energy
= ½(Iw²)
8 = ½w²
16 = w²
w = 4

L = Iw
L = (1)(4)
L = 4 J.s