Question

A ballet dancer of moment of inertia I is spinning about the vertical axis with an angular velocity of 20 rad/s. If she suddenly changes her angular velocity to 10 rad/s, then new moment of inertia would be ?

Answer 1

plz .. help me with this prblm

Answer 2

Plz.. help

Answer 3

Inertia becomes double...

Answer 4

\[L=I \omega \]
so decrease in angular velocity... Causes increase in inertia... with the same ratio...

Answer 5

Kz.. thanx ..:)

Answer 6

L = angular momentum, which will change with angular velocity

I - moment of inertia, sum of mass times [distance from center of gravity] squared, and this is geometrical and not changed by changing her angular velocity.

I is like mass and L is like momentum.

Answer 7

ya i got it .. thanx..:)

Answer 8

Hello guys... you should read the example of a sea diver... when when his angular velocity increases inertia decresase ..... so inertia and angular velocity have inverse relations...

Answer 9

yup.. i will look at that example ..:)

Answer 10

Hmm right

Answer 11

thanx for suggesting ..

Answer 12

welcome

Answer 13

Example of a diver.. Proof.