Astudent was taking a rock-climbing class that used an indoor climbing wall. before he started, the instructoe asked for his weight. if the student had a mass of 88.6kg. what was his weight ?

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.