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 keishas error? an object that is not moving is always in static equilibrium. an object that is moving must be in dynamic equilibrium. an object in either state of equilibrium must have no forces acting on it. an object in either state of equilibrium must have no net force acting on it.

Explanation:

In both static and dynamic equilibrium, the net - force acting on an object is zero. Just having external forces doesn't mean an object can't be in static equilibrium if the net - force is zero. An object at rest with non - zero but balanced external forces is in static equilibrium, and a moving object with zero net force is in dynamic equilibrium.

Answer:

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