A(n) 0.2 kg object is swung in a vertical circular path on a string 0.1 m long. the acceleration of gravity is 9.8 m/s2 . if a constant speed of 6.38 m/s is maintained, what is the tension in the string when the object is at the top of the circle.

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.