一质量为m的子弹进入沙箱时速度为v0,所受的阻力与子弹的速度成正比(比例系数k>0),则子弹能打进的深度是
A <img width="50" height="38" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231941_7255.jpg" /> B <img width="45" height="37" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231943_1317.jpg" /> C <img width="43" height="32" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231943_8817.jpg" /> D <img width="44" height="37" src="https://www.beizhujiaoyu.com/uploads/202208/20210928231945_2411.jpg" />