Aman is standing on a platform that is connected to a pulley arrangement, as the drawing shows. by pulling upward on the rope with a force the man can raise the platform and himself. the total mass of the man plus the platform is 113 kg. what pulling force should the man apply to create an upward acceleration of 1.20 m/s2?

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?