14. what is the maximum walking speed of an adult man whose legs are each 0.90 m long?
3.0 m/s
8.8 m/s
2.8 m/s
4.1 m/s

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?