Question 168: Centre of Mass and Rotational Motion

Question

If force $$\overrightarrow F  = 3\widehat i + 4\widehat j - 2\widehat k$$ acts on a particle position vector $$2\widehat i + \widehat j + 2\widehat k$$ then, the torque about the origin will be :

Accepted Answer

$$\overrightarrow 	au   = \overrightarrow r  	imes \overrightarrow F $$
$$ = (2\widehat i + \widehat j + 2\widehat k) 	imes (3\widehat i + 4\widehat j - 2\widehat k)$$
$$ =  - 10\widehat i + 10\widehat j + 5\widehat k$$

Answer

$$3\widehat i + 4\widehat j - 2\widehat k$$

Answer

$$ - 10\widehat i + 10\widehat j + 5\widehat k$$

Answer

$$10\widehat i + 5\widehat j - 10\widehat k$$

Answer

$$10\widehat i + \widehat j - 5\widehat k$$

Centre of Mass and Rotational Motion

If force $\overrightarrow F = 3\widehat i + 4\widehat j - 2\widehat k acts on a particle position vector 2\widehat i + \widehat j + 2\widehat k$ then, the torque about the origin will be :

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