A cart loaded with sand having total mass `m_(0)=1800kg` moves on a straight horizontal road starting from rest under the action of a force of 120N. The sand spills through a small hole hole in the bottom at a rate of 0.5 kg/sec. What will be the vertically of cart after 20 min?

Options

A. `13.86 m//s`
B. `0.06 m//s`
C. `2.81 m//s`
D. `18.01 m//s`