A drinking straw is inserted horizontally into a stagnant lemonade juicebox at a velocity $V.$

Question $2$ of $9$

Mark each of the following which would be appropriate time$-$based conditions to properly model the motion inside the straw.

A$.$ As time approaches infinite, $v_z=0.$

B$.$ At $t=0,v_z=0.$

C$.$ At $r=R,v_z=v.$

D$.$ None of the above.