Question

Calculate the angular inertia for each given the following values:

a. Mass = 45kg, k = 0.3m

b. Mass = 60.2kg, k = 1.4m

Answer 1

Angular Inertia of body is given by $I=mk^{^{2}}$

where m is mass of object and k is radius of gyration about axis

(a) Here m=45kg and k=0.3m , so $I= (45)\times (0.3)^{2} = 4.05 kgm^{2}$

(b) In this case m=60.2 kg and k = 1.4m , so $I=(60.2)\times (1.4)^{2}=117.992 kgm^{2}$