when temperature of abody made of brass increases ,it's momentum of inertia
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Explanation:
ANSWER
Moment of inertia is given by mr
2
where r= perpendicular distance of the centre of mass of the body from the rotational axis.
If I
1
andI
2
are initial and final moment of inertia for a change in temperature dt, we can write,
I
1
I
2
−I
1
=
r
1
2
r
2
2
−r
1
2
=((1+αdt)
2
−1)=2αdt+α
2
dt
2
Neglecting value of α
2
, we get
I
1
I
2
−I
1
=2αdt
its mometum of the body increases when the speed increases of the body