A 750 N rightward force is used to drag a large crate across the floor with a constant velocity of 1.2 m/s. The coefficient of friction between the crate and the
floor is 0.820. Determine the mass of the box.

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.