Question

when temperature of abody made of brass increases ,it's momentum of inertia ​

Answer 1

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

Answer 2

its mometum of the body increases when the speed increases of the body