MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Centripetal Acceleration

A diver is di...

Question

A diver is diving into water without external torque. If his angular velocity is doubled, the ratio of his initial and final moments of inertia is :

A

1 : 2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

1 : 4

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

2 : 1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

4 : 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $2 : 1$
As there is no external torque, so $I ω = c o n s t a n t$
Thus, $I_{1} ω_{1} = I_{2} ω_{2}$
Now, as $ω_{2} = 2 ω_{1} ⟹ \frac{I_{1}}{I_{2}} = \frac{2}{1}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. While diving down if the diver folds himself compact, then his :
A) angular velocity increases
B) angular momentum decreases
C) rotational kinetic energy increases
D) moment of inertia decreases

Q. A ballet dancer is rotating about his own vertical axis. Without external torque if his angular velocity is doubled then his rotational kinetic energy is:

Q. The angular velocity of a body changes from

ω_{1}

ω_{2}

without applying external torque. Then find the ratio of the initial radius of gyration to the final radius of gyration.

Q. The angular velocity of a body changes from

ω_{1}

ω_{2}

without applying a torque but by changing the moment of inertia. The ratio of corresponding radii of gyration

K_{1} : K_{2}

Q. The angular velocity of a body changes from

ω_{1}

ω_{2}

without applying a torque but the moment of inertia changes. The ratio of corresponding radii of gyration is:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Relative

PHYSICS

Watch in App

explore_more_icon

Explore more

Centripetal Acceleration

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon