Question

Keisha writes that if an object has any external forces acting on it, then the object can be in dynamic equilibrium but not static equilibrium.Which statement best describes Keisha’s error?

Answer 1

D) An object in either state of equilibrium must have no net force acting on it. 

Answer 2

the object will be moving thus it will not not be at rest. when an object is at rest it is said to be static. what will cause an object to move will be the external sources that will be acting on it. the object will move up to a point when the external forces will not be on it or when the external are removed from the object.  when this is done, the object will then come to rest again and will be said to static.