force on rectangular loop

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The top side of a 7cm by 4 cm rectangular loop of wire is 2 cm from a long straight wire.

The long wire is in the same plane as the rectangle, and they have the currents shown. Find

the force (magnitude & direction) on the rectangular loop. How do you solve this?
asked Apr 21, 2014 in Others

$B= \frac{\mu_0 I}{2 \pi r}$
$F= I L \times B$