Question 630: Centre of Mass and Rotational Motion

Question

Find the torque about the origin when a force of 3 $\hat j$
 N acts on a particle whose position vector is 2 $\hat k$ m.

Accepted Answer

Torque is the moment of Force applied.
$\overrightarrow 	au   = \overrightarrow r  	imes \overrightarrow F $
$\overrightarrow 	au   = 2\hat k 	imes 3\hat j$
$\overrightarrow 	au   =  - 6\hat i$
 Nm

Answer

6 $\hat j$
 N m

Answer

$ - $
6 $\hat i$
 N m

Answer

6 $\hat k$
 N m

Answer

6 $\hat i$
 N m

Centre of Mass and Rotational Motion

Find the torque about the origin when a force of 3 \hat j N acts on a particle whose position vector is 2 \hat k m.

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