REMARKS Assume the player is initially moving in the positive $x-$direction. For the first $2\mathrm{.}0s,$ the ballplayer moves in the positive $x-$direction $($the velocity is positive$)$ and steadily accelerates $($the curve is steadily rising$)$ to a maximum speed of $4\mathrm{.}0\frac{m}{s}.$ He moves for $1\mathrm{.}0s$ at a steady speed of $4\mathrm{.}0\frac{m}{s}$ and then slows down in the last second $($the $v$ vs$.t$ curve is falling$),$ still moving in the positive $x-$direction $(v$ is always positive$).$ QUESTION Can a tangent line to a velocity vs$.$ time graph ever be vertical? Explain. $($Select all that apply.$)$ No$.$ It