An ambitious hiker walks 25 km west and then 35 km south in a day. find the magnitude and direction of the hikers resultant displacement (relative to due west).

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.