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Forces of equal magnitude of 0.5 N are a...

Forces of equal magnitude of 0.5 N are acting on a square plate of side `sqrt(2)` m and mass 1 kg as shown in figure. The net torque on the square plate about centre O will be

A

4N m

B

2 `sqrt(2)` N m

C

4 `sqrt(2)` N m

D

2 N m

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