A 0.25 Kg object is projected vertically into the air with a velocity of 45 m/s. How high above the ground is the object after 4.3 seconds? A) 103 m
B) 0 m
C) 87 m
D) 121 m

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?