Which of the following line segments on a position versus time graph is physically impossible?
a. a horizontal line
c. a straight line that slopes to the right
b. a straight line that slopes to the left
d. a vertical line

Question

Which of the following line segments on a position versus time graph is physically impossible?
a. a horizontal line 
c. a straight line that slopes to the right 
b. a straight line that slopes to the left 
d. a vertical line

***[isuru]*** · Answer

d . vertical line
                    the y axis will be the position... but in a vertical line the value of "x" or the time is not changing... u cant change your position without changing the time...