A 40 N force pulls a 4kg block horizontal distance of 8m. The rope makes an angle of 35° with the floor and uk= 0.2. What is the work done by each acting on block? ​

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?