Si el grafico de velocidad vs tiempo muestra una gráfica horizontal, ¿Cuál(es) de las siguientes afirmaciones es(son) siempre correcta(s)? I. La rapidez del objeto es siempre cero
II. La aceleración del objeto es cero
III. La distancia recorrida es cero

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600