The magnetic field lines represent the direction a would go if placed in the field.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.