Question 673: Centre of Mass and Rotational Motion

Question

If $\overrightarrow F $ is the force acting on a particle having position vector $\overrightarrow r $ and $\overrightarrow 	au  $ be the torque of this force about the origin, then

Accepted Answer

Torque is always perpendicular to $\overrightarrow F $ as well as $\overrightarrow r $.
$ 	herefore $ $\overrightarrow r .\overrightarrow 	au   = 0$ as well as $\overrightarrow F .\overrightarrow 	au   = 0$

Answer

$\overrightarrow r .\overrightarrow 	au   > 0$  and  $\overrightarrow F .\overrightarrow 	au   < 0$

Answer

$\overrightarrow r .\overrightarrow 	au   = 0$  and  $\overrightarrow F .\overrightarrow 	au   = 0$

Answer

$\overrightarrow r .\overrightarrow 	au   = 0$  and  $\overrightarrow F .\overrightarrow 	au   
e 0$

Answer

$\vec r.\vec 	au  
e 0$  and  $\overrightarrow F .\overrightarrow 	au   = 0$

Centre of Mass and Rotational Motion

If \overrightarrow F is the force acting on a particle having position vector \overrightarrow r and \overrightarrow \tau be the torque of this force about the origin, then

Choose the correct answer: