Answer
The magnitude of the force is 50N
Work Step by Step
We can find the magnitude of the force needed to make the net force be 5.0N using algebra.
$\tau_{net} = \sum \tau$
$\tau_{net} = r_1~F_1 + r_2~F_2$
5.0Nm= (0)+(0.10m)(F2)$
F2 = 50 N
The magnitude of the force is 50N