Question

(a) Why is moment of inertia called rotational inertia? 

 (b) Calculate M.I of a uniform circular disc of mass 500gm and radius 10cm about 

(i) Diameter (ii) axis tangent to the disc and parallel to diameter 

 (c) Axis passing trough centre and perpendicular to its plane?

Answer 1

(a) Moment of inertia is called rotational inertia because it measures moment of inertia during its rotational motion.