Question

A brass disc is rotating about its axis. If temperature of disc is increased then its ​

Answer 1

Answer:

Radius of gyration and

moment of inertia will increase.

∵I=mk

2

k=

m

I

I=

2

mR

2

k=

2

R

A=A

0

(1+2αΔT)(eq

n

of thermal expansion)

πr

2

=πR

0

2

(1+2αΔT)

r

2

=R

0

2

(1+2αΔT)

∴ r will increase on increasing the temperature

∴I and k will increase on increasing the temperature

Explanation:

hope it will help you

Answer 2

Radius of gyration and

moment of inertia will increase.

∵I=mk

2

k=

m

I

​

​

I=

2

mR

2

​

k=

2

​

R

​

A=A

0

​

(1+2αΔT)(eq

n

of thermal expansion)

πr

2

=πR

0

2

​

(1+2αΔT)

r

2

=R

0

2

​

(1+2αΔT)

∴ r will increase on increasing the temperature

∴I and k will increase on increasing the temperature:



Explanation: