Torque Expressions (Jee Mains)

Scalar and Vector Products

Medium

Torque Expressions

Which of the following are correct expression for torque acting on a body?
A. $\vec \tau = \vec r \times \vec L$
B. $\vec \tau = \frac{d}{{dt}}\left( {\vec r \times \vec p} \right)$
C. $\vec \tau = \vec r \times \frac{{d\vec p}}{{dt}}$
D. $\vec \tau = I\,\vec \alpha$
E. $\vec \tau = {\kern 1pt} \vec r \times \vec F$
( $\vec r$ = position vector; $\vec p$ = linear momentum;
$\vec L$ = angular momentum; $\vec \alpha$ = angular acceleration; I = moment of inertia; $\vec F$ = force; t = time)
Choose the correct answer from the options given below :

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Scalar and Vector Products

Medium

Torque Expressions

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