You need to know the height of a tower, but darkness obscures the ceiling. you note that a pendulum extending from the ceiling almost touches the floor and that its period is 22 s. the acceleration of gravity is 9.81 m/s 2 . how tall is the tower?

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.