Question

. A disc of moment of inertia 5*10kg/m’is rotating freely about an axis passing through its
Centre and perpendicular to its plane at 40 rpm. Calculate its new angular speed in revolutions
per minute, if some wax of mass 0.02 kg is dropped gently onto the disc 0.08m from its axis.

Answer 1

Answer:

$12.5 \times {10}^{5}$

Answer 2

Explanation:

Alc to the principal of conservation of angular momentum