If a stress of 1. 05×107 n/m2 is applied to his ligament, how much will it stretch? the young's modulus for the acl is 1. 10×108 n/m2.

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?