A dog was seen running down a street, 334 m long. If a bystander saw the dog running at 1.3 m/s before coming to a
stop, calculate the dog's acceleration?

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?