Question

Question #e7044

Answer 1

Moment means moment of inertia.. See.

Explanation:

For smaller objects we suppose them as a particle.But when it is a case of a body of a larger size we cannot make out the body as a particle. We have to calculate the moment of inertia of the object.

Here the large object's part are taken as `m_1,m_2,m_3,m_4`.
It is formula that moment of inertia of the mass is `mr^2` when `m` is the mass and the `r` is the distance from the turning axis.
The total moment of inertia of the object is
`m_1r_1^2+m_2r_2^2+m_3r_3^2+...=summr^2`
The moment of the object is written as `I=sumMR^2` or. `intr^2dm`