a crane gradually lifts a car with a mass of 1000kg at constant speed to height of 5cm. Calculate the potential energy of the car at that height.​

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.