The work-energy theorem states that Work = Change in Kinetic Energy. A 5.0 kg crate is moving at 5.0 m/s. How much work would be needed to increase the speed to 10.0 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?