A ruler of length 0.30 m is pivoted at its centre. Equal and opposite forces of magnitude 2.0 N are applied to the ends of the ruler, creating a couple as shown.
What is the magnitude of the torque of the couple on the ruler when it is in the position shown?

1 )
0.23 Nm
2 )
0.39 Nm
0.46 Nm
4 )
0.60 Nm
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