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

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