If I, a and t are the moment of inertia, angular acceleration and torque respectively of a body rotating about any axis with angular velocity w, then
 

  • Option 1)

    t = Ia

  • Option 2)

    t = Iw

  • Option 3)

    I = tw

  • Option 4)

    a = Iw

 

Answers (1)

As we learnt in

Analogue of second law of motion for pure rotation -

\vec{\tau }=I\, \alpha

- wherein

Torque equation can be applied only about two point

(i) centre of motion.

(ii) point which has zero velocity/acceleration.

 

 \tau=I \alpha

\alpha=a

t=\tau

t=Ia


Option 1)

t = Ia

This option is correct.

Option 2)

t = Iw

This option is incorrect.

Option 3)

I = tw

This option is incorrect.

Option 4)

a = Iw

This option is incorrect.

Preparation Products

Knockout BITSAT 2021

It is an exhaustive preparation module made exclusively for cracking BITSAT..

₹ 4999/- ₹ 2999/-
Buy Now
Knockout BITSAT-JEE Main 2021

An exhaustive E-learning program for the complete preparation of JEE Main and Bitsat.

₹ 27999/- ₹ 16999/-
Buy Now
Exams
Articles
Questions