Question

the moment of inertia of a rod of length 1m and mass m about the axis which is 1/3 m from one end is equal to

Answer 1

Answer:

Here we can use parallel axis theorem.

as you know that moment of inertia of a rod about centre of mass is ML²/12

then from centre of mass to one end distance =L/2

then, moment of inertia at any end of rod=[ML²/12]+[M(L/2)²]

=(ML²/12)+(ML²/4)

=4ML²/12 = ML²/3