An object is placed in a fluid and then released assume that the object either floats to the surface (settling so that the object is partly above and partly below the fluid surface) or sinks to the bottom (note that for parts a through d, you should assume that the object has settled in equilibrium)

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.