4. In the graph above, a toy car rolls from +3 m to +5 m. Which of the following statements is true? (1pt.)
a. X = +3 m
C. Dx = +3 m
b. x = +3 m
d. Vang= 3 m/s

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.