Una pelota rueda hacia arriba por un plani inclinado, de tal modo que llega hasta la parte superior en 3 segundos. La velocidad de la pelota canbua 4m/seg. Cada segundo de recorrido. Cuál es la longitud del plano inclinado y cual fue la velocidad inicial de la pelota?

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