# The rotational inertia of a disk about its axis is 0.70kgm2. When a 2kg mass is added to its rim ,0.40m what will be its rotational inertia?

##### 1 Answer

Aug 7, 2018

#### Answer:

The moment of inertia is

#### Explanation:

The moment of inertia of the disc about the axis

The moment of inertia of the mass is

The total moment of inertia is